What is the optimal barrel length for getting the most out of a 308? Looking at maximizing the shooting capability of this caliber in terms of accuracy and distance, not so much concerned about the maneuverability aspect. I know there are a lot of other calibers out there that are better but I am only concerned about the 308.
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Re: 308 Barrel length
Palma shooters use 30"+, and they like it. I sure love mine.
Palma shooters use 30"+, and they like it. I sure love mine.
Re: 308 Barrel length
Mine is 28" and it works great
On avg im using 1- 1.5 grains less powder(varget) getting slightly faster velocity than my old 24" barrel
Mine is 28" and it works great
On avg im using 1- 1.5 grains less powder(varget) getting slightly faster velocity than my old 24" barrel
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DocB</div><div class="ubbcode-body">wspe,
26" optimizes velocity for anything over 155s. Accuracy tuning depends on your setup.
HTH,
DocB </div></div>
That is what I was looking for. Thanks for the info. Also are there barrel lengths that will destabilize rounds due to the harmonics of the barrel, such as lengths from 21-24 lengths, will make the round less accurate? I have also heard that shorter barrels work well because they do not move as much when fired due to them being shorter and stiffer, however they are not maximizing the velocity of the round.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DocB</div><div class="ubbcode-body">wspe,
26" optimizes velocity for anything over 155s. Accuracy tuning depends on your setup.
HTH,
DocB </div></div>
That is what I was looking for. Thanks for the info. Also are there barrel lengths that will destabilize rounds due to the harmonics of the barrel, such as lengths from 21-24 lengths, will make the round less accurate? I have also heard that shorter barrels work well because they do not move as much when fired due to them being shorter and stiffer, however they are not maximizing the velocity of the round.
Re: 308 Barrel length
Someone once asked Abraham Lincoln how long should a man's legs be? He replied, long enough to touch the ground. I think the same applies to barrel length. What are you going to do with the gun? The barrel should be long enough to accomplish that.
Someone once asked Abraham Lincoln how long should a man's legs be? He replied, long enough to touch the ground. I think the same applies to barrel length. What are you going to do with the gun? The barrel should be long enough to accomplish that.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Patriot Prepper</div><div class="ubbcode-body">Someone once asked Abraham Lincoln how long should a man's legs be? He replied, long enough to touch the ground. I think the same applies to barrel length. What are you going to do with the gun? The barrel should be long enough to accomplish that. </div></div>
I like that.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Patriot Prepper</div><div class="ubbcode-body">Someone once asked Abraham Lincoln how long should a man's legs be? He replied, long enough to touch the ground. I think the same applies to barrel length. What are you going to do with the gun? The barrel should be long enough to accomplish that. </div></div>
I like that.
Re: 308 Barrel length
If you study the "Secrets of the Huston Warehouse" and Dr Mann's
"The bullets flight from powder to target"
You see that the most accurate barrel would be 17 3/4" .
In a gas gun such as a M14/M1A I like to go to 22 inches because with their existing flash hiders you get no muzzle flash (detectable at night) using M118 and simular loads.
If you study the "Secrets of the Huston Warehouse" and Dr Mann's
"The bullets flight from powder to target"
You see that the most accurate barrel would be 17 3/4" .
In a gas gun such as a M14/M1A I like to go to 22 inches because with their existing flash hiders you get no muzzle flash (detectable at night) using M118 and simular loads.
Re: 308 Barrel length
I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it.
I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it.
Re: 308 Barrel length
I shoot a 30" on my 308 and velocities are great. 155s over 3100 and 208s over 2800.
I shoot a 30" on my 308 and velocities are great. 155s over 3100 and 208s over 2800.
Re: 308 Barrel length
Yes, 17 behind the 208s, and Varget behind 155s.
Here are pics, the 208s have gone over 2800, but I primarily shoot 155s:
Yes, 17 behind the 208s, and Varget behind 155s.
Here are pics, the 208s have gone over 2800, but I primarily shoot 155s:
Re: 308 Barrel length
208s and RL17 have worked real well for me in the 308, short and long barrel. I moly mine, and load to around 3.00" oal.
I'm getting 2620 fps in my 20.5" rifle, and 2700 fps in the 26" rifle.
2800 from a 30" doesn't surprise me, that's wicked performance for a 308.
208s and RL17 have worked real well for me in the 308, short and long barrel. I moly mine, and load to around 3.00" oal.
I'm getting 2620 fps in my 20.5" rifle, and 2700 fps in the 26" rifle.
2800 from a 30" doesn't surprise me, that's wicked performance for a 308.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kraigWY</div><div class="ubbcode-body">If you study the "Secrets of the Huston Warehouse" and Dr Mann's
"The bullets flight from powder to target"
You see that the most accurate barrel would be 17 3/4" .
In a gas gun such as a M14/M1A I like to go to 22 inches because with their existing flash hiders you get no muzzle flash (detectable at night) using M118 and simular loads. </div></div>
Pretty sure it was 21 3/4 .....
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kraigWY</div><div class="ubbcode-body">If you study the "Secrets of the Huston Warehouse" and Dr Mann's
"The bullets flight from powder to target"
You see that the most accurate barrel would be 17 3/4" .
In a gas gun such as a M14/M1A I like to go to 22 inches because with their existing flash hiders you get no muzzle flash (detectable at night) using M118 and simular loads. </div></div>
Pretty sure it was 21 3/4 .....
Re: 308 Barrel length
If its not a heavy contour than the long the barrel the more whip its going to have. Todd Hodnett on the magpul DVD for precision rifle said that "he has found a rigid 20" barrel is best". Take that for what its worth.
If its not a heavy contour than the long the barrel the more whip its going to have. Todd Hodnett on the magpul DVD for precision rifle said that "he has found a rigid 20" barrel is best". Take that for what its worth.
Re: 308 Barrel length
The 155s have shot numerous groups in the .1s for me (and I haven't shot all that many of them), so when I do get to shoot the 308, I've stuck with them.
The 155s have shot numerous groups in the .1s for me (and I haven't shot all that many of them), so when I do get to shoot the 308, I've stuck with them.
Re: 308 Barrel length
Theres a length thats right for everyone, correct?
In general it sounds like the question asked was in terms of length versus efficient velocity?
The rule of thumb I heard was that velocity increases 50fps per inch of barrel from 24"(box label speeds) to 30" ish. then slows by 100fps past 34ish"
then, its just getting bullet weight/speed/spin to match what distance you shoot. correct me if im wrong, but its what I knew.
Theres a length thats right for everyone, correct?
In general it sounds like the question asked was in terms of length versus efficient velocity?
The rule of thumb I heard was that velocity increases 50fps per inch of barrel from 24"(box label speeds) to 30" ish. then slows by 100fps past 34ish"
then, its just getting bullet weight/speed/spin to match what distance you shoot. correct me if im wrong, but its what I knew.
Re: 308 Barrel length
unreal speed for 155's,i thought 2900 was good on a 26"
unreal speed for 155's,i thought 2900 was good on a 26"
Re: 308 Barrel length
Shot my 18" out to a grand today using 175smk's
Shot my 18" out to a grand today using 175smk's
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308? Looking at maximizing the shooting capability of this caliber in terms of accuracy and distance,</div></div>It depends. If there was a definitive answer I am sure that this Site would publish the final word on the topic and then shut it down.
If I don't need the portability of a short rifle I like 22" of rifling, which makes the barrel about 23 1/4".
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308? Looking at maximizing the shooting capability of this caliber in terms of accuracy and distance,</div></div>It depends. If there was a definitive answer I am sure that this Site would publish the final word on the topic and then shut it down.
If I don't need the portability of a short rifle I like 22" of rifling, which makes the barrel about 23 1/4".
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308?</div></div>
Good question. There is a reason I have a safe containing everything from 16" to 26". I am considering a 12.5" soon.
Since you are posting this in the ELR section, I am going to assume you are looking for as much speed as possible to push a .30 bullet as far as you can. For that I would start with a 30" barrel. It's easy to trim it up. More difficult to add length.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308?</div></div>
Good question. There is a reason I have a safe containing everything from 16" to 26". I am considering a 12.5" soon.
Since you are posting this in the ELR section, I am going to assume you are looking for as much speed as possible to push a .30 bullet as far as you can. For that I would start with a 30" barrel. It's easy to trim it up. More difficult to add length.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308?</div></div>
Good question. There is a reason I have a safe containing everything from 16" to 26". I am considering a 12.5" soon.
Since you are posting this in the ELR section, I am going to assume you are looking for as much speed as possible to push a .30 bullet as far as you can. For that I would start with a 30" barrel. It's easy to trim it up. More difficult to add length. </div></div>
Do you really gain anything beyond 20" in .308? What twist do you use in a 26" barrel for .308?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: wspe1</div><div class="ubbcode-body">What is the optimal barrel length for getting the most out of a 308?</div></div>
Good question. There is a reason I have a safe containing everything from 16" to 26". I am considering a 12.5" soon.
Since you are posting this in the ELR section, I am going to assume you are looking for as much speed as possible to push a .30 bullet as far as you can. For that I would start with a 30" barrel. It's easy to trim it up. More difficult to add length. </div></div>
Do you really gain anything beyond 20" in .308? What twist do you use in a 26" barrel for .308?
Re: 308 Barrel length
Twist is a function of muzzle velocity and projectile length, not barrel length.
You gain velocity with a longer barrel. How much of a gain is extremely dependent upon barrel construction and load data.
A crappy long factory barrel is not going to get you as much velocity as a short premium tube.
When chucking .30's to long range, velocity is key.
A longer barrel is not more accurate, but all else being equal it will be faster than a shorter barrel.
Twist is a function of muzzle velocity and projectile length, not barrel length.
You gain velocity with a longer barrel. How much of a gain is extremely dependent upon barrel construction and load data.
A crappy long factory barrel is not going to get you as much velocity as a short premium tube.
When chucking .30's to long range, velocity is key.
A longer barrel is not more accurate, but all else being equal it will be faster than a shorter barrel.
Re: 308 Barrel length
I have a 25inch barrel and wish it was at least 28 with 30 inch being perfect.
I have a 25inch barrel and wish it was at least 28 with 30 inch being perfect.
Re: 308 Barrel length
Part of the answer for this depends on burn rate of powder, it is best to have the powder choice and charge amount burned off with about 2 inches of barrel travel left for the bullet. So also factor in this, I am old school USMC my .308 barrels are 25” measured from the lug. With Varget am driving a 185 Berger VLD @ 2790 out of a Palma cut chamber.
Part of the answer for this depends on burn rate of powder, it is best to have the powder choice and charge amount burned off with about 2 inches of barrel travel left for the bullet. So also factor in this, I am old school USMC my .308 barrels are 25” measured from the lug. With Varget am driving a 185 Berger VLD @ 2790 out of a Palma cut chamber.
Re: 308 Barrel length
I was amazed of the velocity I was getting out of my GAP built rifle with 22" barrel, then found out they are using a 308 tight bore (.299), which increases velocity. Honestly, I have no problem hitting steel at 1200-yards with my TRG-22/20" using factory FGMM 175 SMK.
I was amazed of the velocity I was getting out of my GAP built rifle with 22" barrel, then found out they are using a 308 tight bore (.299), which increases velocity. Honestly, I have no problem hitting steel at 1200-yards with my TRG-22/20" using factory FGMM 175 SMK.
Re: 308 Barrel length
it all depends on what kind of shooting you will be doing. 25 inches and up is great for benchrest, but for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics. you may lose a little in velocity, but the mutt on the recieving end wont know the difference if the bullet if flying 100 fps less or not
it all depends on what kind of shooting you will be doing. 25 inches and up is great for benchrest, but for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics. you may lose a little in velocity, but the mutt on the recieving end wont know the difference if the bullet if flying 100 fps less or not
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jay foxtrot</div><div class="ubbcode-body">for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics.</div></div>
Speaking from what background?
Have you actually operated as a military sniper with a long or short barreled rifle?
If you glance at the top of the section, you will see it says "ELR - Beyond 1000 Yards". If you are slinging a .30 beyond 1K you will want all the extra gas you can get. Velocity isn't just drop. It's wind drift too.
Weight and maneuverability don't matter if you don't hit.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jay foxtrot</div><div class="ubbcode-body">for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics.</div></div>
Speaking from what background?
Have you actually operated as a military sniper with a long or short barreled rifle?
If you glance at the top of the section, you will see it says "ELR - Beyond 1000 Yards". If you are slinging a .30 beyond 1K you will want all the extra gas you can get. Velocity isn't just drop. It's wind drift too.
Weight and maneuverability don't matter if you don't hit.
Re: 308 Barrel length
Seriously... I've never had my hands on a SWS that was less then 24".
I think it's only recently (5 years?) that LE/Mil have been exploring shorter barrels.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jay foxtrot</div><div class="ubbcode-body">for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics.</div></div>
Speaking from what background?
Have you actually operated as a military sniper with a long or short barreled rifle?
If you glance at the top of the section, you will see it says "ELR - Beyond 1000 Yards". If you are slinging a .30 beyond 1K you will want all the extra gas you can get. Velocity isn't just drop. It's wind drift too.
Weight and maneuverability don't matter if you don't hit. </div></div>
Seriously... I've never had my hands on a SWS that was less then 24".
I think it's only recently (5 years?) that LE/Mil have been exploring shorter barrels.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LoneWolfUSMC</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: jay foxtrot</div><div class="ubbcode-body">for military sniper/tactical you want a shorter stiffer barrel for more manuverability and harmonics.</div></div>
Speaking from what background?
Have you actually operated as a military sniper with a long or short barreled rifle?
If you glance at the top of the section, you will see it says "ELR - Beyond 1000 Yards". If you are slinging a .30 beyond 1K you will want all the extra gas you can get. Velocity isn't just drop. It's wind drift too.
Weight and maneuverability don't matter if you don't hit. </div></div>
Re: 308 Barrel length
Getting 2500fps with the 208 amax out of my 17" .308 not seeing pressure till I push closer to 2600. That's more than enough to make hits out to 1200 yards @ sea level
Getting 2500fps with the 208 amax out of my 17" .308 not seeing pressure till I push closer to 2600. That's more than enough to make hits out to 1200 yards @ sea level
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Getting 2500fps with the 208 amax out of my 17" .308 not seeing pressure till I push closer to 2600. That's more than enough to make hits out to 1200 yards @ sea level </div></div>
RL-17?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Getting 2500fps with the 208 amax out of my 17" .308 not seeing pressure till I push closer to 2600. That's more than enough to make hits out to 1200 yards @ sea level </div></div>
RL-17?
Re: 308 Barrel length
Yep RL-17, here is the data that I posted in a different thread.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Also got my Magnetospeed in with the suppressor mount and it has functioned flawlessly. I started doing some work on a load for the new 17" barrel. Loaded up some 208 amax & RL-17 in some once fired win brass. Loaded long @ 2.97" COAL just kissing the lands.
44 - 2302
45 - 2328
45.5 - 2338
46 - 2349
46.5 - 2403
47 - 2402
47.5 - 2457
48 - 2454
48.5 - 2492
49 - 2518
49.5 - 2578 (ejector swipe)
50 - 2592 (ejector swipe)
My goal was 2500fps, so I plan to load up some more rounds in the 48.5-49g range and play around with jumping them .02" - see if I can find something accurate.</div></div>
Yep RL-17, here is the data that I posted in a different thread.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Also got my Magnetospeed in with the suppressor mount and it has functioned flawlessly. I started doing some work on a load for the new 17" barrel. Loaded up some 208 amax & RL-17 in some once fired win brass. Loaded long @ 2.97" COAL just kissing the lands.
44 - 2302
45 - 2328
45.5 - 2338
46 - 2349
46.5 - 2403
47 - 2402
47.5 - 2457
48 - 2454
48.5 - 2492
49 - 2518
49.5 - 2578 (ejector swipe)
50 - 2592 (ejector swipe)
My goal was 2500fps, so I plan to load up some more rounds in the 48.5-49g range and play around with jumping them .02" - see if I can find something accurate.</div></div>
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Here is a link to the other post; 17" .308 </div></div>
I tried some but I felt it was too pressure sensitive....
I didn't get a chance to read your thread yet but what's the highest temp you've shot it in.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Here is a link to the other post; 17" .308 </div></div>
I tried some but I felt it was too pressure sensitive....
I didn't get a chance to read your thread yet but what's the highest temp you've shot it in.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: redeye</div><div class="ubbcode-body">If its not a heavy contour than the long the barrel the more whip its going to have. Todd Hodnett on the magpul DVD for precision rifle said that "he has found a rigid 20" barrel is best". Take that for what its worth. </div></div>
Again, I guess it all depends on what you're trying to do, but it seems as though the people focusing more on "tactical" accuracy out of .308s (hitting vital-area sized targets at long range) are moving to shorter barrels. As mentioned, Todd Hodnett likes a shorter barrel because of improved harmonics and stiffness. GPS Defense Sniper School (formerly McMillan) builds class rifles to 18" and they shoot them beyond 1100. In the Magpul Video Tod Hodnett had Travis shooting at a mile with an 18" gas gun. GPS used to have an explanation on their choice of barrel length on their website which I can't find anymore. In essence they found that the shorter barrel offered more stiffness and inherent accuracy, but a loss of velocity, necessitating increased elevation adjustment at extended ranges.
I guess if you're shooting at very small "X's" for score, rather than shooting for hits on steel, the equation may change.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: redeye</div><div class="ubbcode-body">If its not a heavy contour than the long the barrel the more whip its going to have. Todd Hodnett on the magpul DVD for precision rifle said that "he has found a rigid 20" barrel is best". Take that for what its worth. </div></div>
Again, I guess it all depends on what you're trying to do, but it seems as though the people focusing more on "tactical" accuracy out of .308s (hitting vital-area sized targets at long range) are moving to shorter barrels. As mentioned, Todd Hodnett likes a shorter barrel because of improved harmonics and stiffness. GPS Defense Sniper School (formerly McMillan) builds class rifles to 18" and they shoot them beyond 1100. In the Magpul Video Tod Hodnett had Travis shooting at a mile with an 18" gas gun. GPS used to have an explanation on their choice of barrel length on their website which I can't find anymore. In essence they found that the shorter barrel offered more stiffness and inherent accuracy, but a loss of velocity, necessitating increased elevation adjustment at extended ranges.
I guess if you're shooting at very small "X's" for score, rather than shooting for hits on steel, the equation may change.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Onemoretime</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Here is a link to the other post; 17" .308 </div></div>
I tried some but I felt it was too pressure sensitive....
I didn't get a chance to read your thread yet but what's the highest temp you've shot it in.</div></div>
It was in the low 80s when I did that pressure test. Also I didn't give the barrel a break in-between shots.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Onemoretime</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RedGoat</div><div class="ubbcode-body">Here is a link to the other post; 17" .308 </div></div>
I tried some but I felt it was too pressure sensitive....
I didn't get a chance to read your thread yet but what's the highest temp you've shot it in.</div></div>
It was in the low 80s when I did that pressure test. Also I didn't give the barrel a break in-between shots.
Re: 308 Barrel length
I piecing together an M2008 17" .308 build.
How's muzzle flash for you? I'm debating going with a Brake or a FS. Leaning toward the PWS FSC30.
I piecing together an M2008 17" .308 build.
How's muzzle flash for you? I'm debating going with a Brake or a FS. Leaning toward the PWS FSC30.
Re: 308 Barrel length
Muzzle flash has not been an issue. I almost always fire with a suppressor attached (TBAC 30BA), but of the few rounds I have put down range without it I haven't noticed the muzzle flash being an issue.
Muzzle flash has not been an issue. I almost always fire with a suppressor attached (TBAC 30BA), but of the few rounds I have put down range without it I haven't noticed the muzzle flash being an issue.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable?
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable? </div></div>
175SMK is not a heavy bullet, you can easily push them out of a 1x13twist and they are perfectly stable.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable? </div></div>
175SMK is not a heavy bullet, you can easily push them out of a 1x13twist and they are perfectly stable.
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 30SMK</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable? </div></div>
175SMK is not a heavy bullet, you can easily push them out of a 1x13twist and they are perfectly stable. </div></div>
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 30SMK</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: J Blaze</div><div class="ubbcode-body">I'm shooting a 22" barrel and pushing 175gr SMKs at 2700 fps. It is accurate out to a grand... The furthest I've shot with it. </div></div>
What a twist 1:10 or 1:12?
1:10 for such heavy bullets,
1:12 probably will not be stable? </div></div>
175SMK is not a heavy bullet, you can easily push them out of a 1x13twist and they are perfectly stable. </div></div>
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body">
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
</div></div>
Guess someone better tell the folks running Berger 155.5BTs (~1.242") and 185 Juggernauts (~1.364") out of a 1:12" tw that...
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body">
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
</div></div>
Guess someone better tell the folks running Berger 155.5BTs (~1.242") and 185 Juggernauts (~1.364") out of a 1:12" tw that...
Re: 308 Barrel length
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body">
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
</div></div>
I don't believe there is a .308" bullet 1.185" or shorter that would even be suitable for 1000 yards.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kristian55</div><div class="ubbcode-body">
How long is the bullet?
My opinion, for shooting for 1000, twist1:12 max. length of a bullet can be about 1.185".
</div></div>
I don't believe there is a .308" bullet 1.185" or shorter that would even be suitable for 1000 yards.
Re: 308 Barrel length
The old Sierra 155 Matchking (2155) is listed as being ~1.131" per Litz... but pretty much everything else (B155VLD, Lapua 154 Scenar, S155MK (2156), S175MK, etc.) is longer. While it may not be what all the cool kids today are shooting, the old S155MK got the job done for a number of years. YMMV.
The old Sierra 155 Matchking (2155) is listed as being ~1.131" per Litz... but pretty much everything else (B155VLD, Lapua 154 Scenar, S155MK (2156), S175MK, etc.) is longer. While it may not be what all the cool kids today are shooting, the old S155MK got the job done for a number of years. YMMV.
Re: 308 Barrel length
Ok, I see it is in the Quickload database too.
Ok, I see it is in the Quickload database too.
Re: 308 Barrel length
data for 308.
data for 308.
Re: 308 Barrel length
most LR shooters..800-1200 yds... use 30"+ barrels....
bill larson
most LR shooters..800-1200 yds... use 30"+ barrels....
bill larson
