Optimal 6BR length and twist 107SMK
- Thread starter Greg Langelius *
- Start date
Re: Optimal 6BR length and twist 107SMK
I would get an 8 twist. As for length I have no idea. All my 243's and 243AI's that I have built I put on an 8twist so that I could shoot the 105-107 range of bullets.
I know of others using a 7.5 twist to run the 115dtacs. Hope this helps
I would get an 8 twist. As for length I have no idea. All my 243's and 243AI's that I have built I put on an 8twist so that I could shoot the 105-107 range of bullets.
I know of others using a 7.5 twist to run the 115dtacs. Hope this helps
Re: Optimal 6BR length and twist 107SMK
This mirrors precisely what I've researched so far.
L-W lists a 26" Savage prefit for $295, but the twist spec is 1:14". their barrel blank price listings are actually somewhat cheaper for a .243 1:8" than for a .243 1:14"
Greg
This mirrors precisely what I've researched so far.
L-W lists a 26" Savage prefit for $295, but the twist spec is 1:14". their barrel blank price listings are actually somewhat cheaper for a .243 1:8" than for a .243 1:14"
Greg
Re: Optimal 6BR length and twist 107SMK
For 200 yard shooting? The 107 is not necessary for these ranges. You're likely better off shooting a lighter bullet like a 68gr Berger. The 14 twist is plenty for bullets in that weight range.
If you do really want to run the 107s, an 8 twist is your friend.
Most people run 26"-28". I've got a 24" on my 6br and love it.
For 200 yard shooting? The 107 is not necessary for these ranges. You're likely better off shooting a lighter bullet like a 68gr Berger. The 14 twist is plenty for bullets in that weight range.
If you do really want to run the 107s, an 8 twist is your friend.
Most people run 26"-28". I've got a 24" on my 6br and love it.
Re: Optimal 6BR length and twist 107SMK
i agree with darrenk75b, if you are only shooting 200 yards you don't the higher BC bullet. However if you crossover and shoot some f-class or highpower at 600, the 8 twist 105-107gr bullet will be a winner. But you know that.
i agree with darrenk75b, if you are only shooting 200 yards you don't the higher BC bullet. However if you crossover and shoot some f-class or highpower at 600, the 8 twist 105-107gr bullet will be a winner. But you know that.
Re: Optimal 6BR length and twist 107SMK
agreed if shooting only 200yds 68's will be much more accurate they will just suck past 300yds. if 600yds is your goal for sure 8 twist and call benchmark barrels they make prefit savage barrels also but don't advertise and you can get any option you want.
agreed if shooting only 200yds 68's will be much more accurate they will just suck past 300yds. if 600yds is your goal for sure 8 twist and call benchmark barrels they make prefit savage barrels also but don't advertise and you can get any option you want.
Re: Optimal 6BR length and twist 107SMK
http://www.accurateshooter.com/cartridge-guides/6mmbr/
8 twist is not needed for 200 yards.
http://www.accurateshooter.com/cartridge-guides/6mmbr/
8 twist is not needed for 200 yards.
Re: Optimal 6BR length and twist 107SMK
OK, I agree with the popular thinking about twist. I'm some ways away from being able to order the barrel, but when I do, it's going to be a swap barrel for the Dancer.
Since I already have the 1Kyd .260 barrel from L-W, this barrel will be dedicated to 200yd-ish shooting. I believe the pre-fit 26" 1:14" L-W $295 finished barrel will serve my purposes. There's no need for me to reinvent anything here.
Per Nosler, their 60, 70, and 80gr Ballistic Tip bullets will perform in this twist.
Greg
OK, I agree with the popular thinking about twist. I'm some ways away from being able to order the barrel, but when I do, it's going to be a swap barrel for the Dancer.
Since I already have the 1Kyd .260 barrel from L-W, this barrel will be dedicated to 200yd-ish shooting. I believe the pre-fit 26" 1:14" L-W $295 finished barrel will serve my purposes. There's no need for me to reinvent anything here.
Per Nosler, their 60, 70, and 80gr Ballistic Tip bullets will perform in this twist.
Greg
Re: Optimal 6BR length and twist 107SMK
If it were me i would go with the 1:8 twist just so that you can shoot out to further ranges if you want with the 107's just my .02
If it were me i would go with the 1:8 twist just so that you can shoot out to further ranges if you want with the 107's just my .02
Re: Optimal 6BR length and twist 107SMK
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Tatertot</div><div class="ubbcode-body">If it were me i would go with the 1:8 twist just so that you can shoot out to further ranges if you want with the 107's just my .02 </div></div>
+1. If you are going to order the barrel anyway and not looking to just snag something that ships immediately, then I'd get a 1:8 and not look back. I have no problem shooting the lighter bullets in my 1:8 6br, and the twist will turn your barrel into a 600+ yard capable rifle
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Tatertot</div><div class="ubbcode-body">If it were me i would go with the 1:8 twist just so that you can shoot out to further ranges if you want with the 107's just my .02 </div></div>
+1. If you are going to order the barrel anyway and not looking to just snag something that ships immediately, then I'd get a 1:8 and not look back. I have no problem shooting the lighter bullets in my 1:8 6br, and the twist will turn your barrel into a 600+ yard capable rifle
Re: Optimal 6BR length and twist 107SMK
Greg,
I agree with the theory of getting a 1 in 8 twist for the 6BR. Stay in the 65-95 grain weights for the shorter range but, just in case, you have the right tool to get to 600 as well.
Greg,
I agree with the theory of getting a 1 in 8 twist for the 6BR. Stay in the 65-95 grain weights for the shorter range but, just in case, you have the right tool to get to 600 as well.
Re: Optimal 6BR length and twist 107SMK
If I didn't already have a 28" 1:8" L-W barrel chambered in .260 Rem, I might do that. The 6BR does OK at LR, but my impression is, I already have another chambering that will do the same LR job at least as well. It has already shot sequences of X's for me at 1Kyd.
Greg
If I didn't already have a 28" 1:8" L-W barrel chambered in .260 Rem, I might do that. The 6BR does OK at LR, but my impression is, I already have another chambering that will do the same LR job at least as well. It has already shot sequences of X's for me at 1Kyd.
Greg
Re: Optimal 6BR length and twist 107SMK
If you are going out to 200 only the 12 or 14 twist is the only way to go. If you are going to get a prefit barrel i would see if you can get it in 21 or 22 inch length max. Most all the people i know and shoot with use 66gr. to 70 gr. bullets in this type of shooting.
If you are going out to 200 only the 12 or 14 twist is the only way to go. If you are going to get a prefit barrel i would see if you can get it in 21 or 22 inch length max. Most all the people i know and shoot with use 66gr. to 70 gr. bullets in this type of shooting.
Re: Optimal 6BR length and twist 107SMK
Greetings Brother Greg,
For 200yds...I would humbly suggest an 1-8" twist barrel chambered for 22BR.
I've had great success with 69gr SMKs.
I recall kicking an 8"twist 22-250 around with you some years back.
I've sold that Savage but ONLY because of severely diminished range time...
Be Well,
Pete
Greetings Brother Greg,
For 200yds...I would humbly suggest an 1-8" twist barrel chambered for 22BR.
I've had great success with 69gr SMKs.
I recall kicking an 8"twist 22-250 around with you some years back.
I've sold that Savage but ONLY because of severely diminished range time...
Be Well,
Pete
Re: Optimal 6BR length and twist 107SMK
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dan Tucker</div><div class="ubbcode-body">If you are going out to 200 only the 12 or 14 twist is the only way to go. If you are going to get a prefit barrel i would see if you can get it in 21 or 22 inch length max. Most all the people i know and shoot with use 66gr. to 70 gr. bullets in this type of shooting. </div></div>
I agree 100%. Since you have a 260 that you intend on using at longer ranges, I see no need to run 107s with a fast twist
67gr BIBs or 68gr Barts bullets in a 14 twist will give you the best 200yd results.
An even better option, if you are willing to deviate from the 6BR, is the 30BR with a 17 twist shooting the 118gr pills. The Robinette seems to be the best reamer for this setup. Guys are using this in score shooting and they are phenomenal.
But if you have to stick with the 107, I would say you need an 8tw, cut with a 272nk and 104fb reamer.
And if your a believer of the Houston Warehouse results, a 21-22 inch barrel is the sweet spot (6PPC was the tested case).
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dan Tucker</div><div class="ubbcode-body">If you are going out to 200 only the 12 or 14 twist is the only way to go. If you are going to get a prefit barrel i would see if you can get it in 21 or 22 inch length max. Most all the people i know and shoot with use 66gr. to 70 gr. bullets in this type of shooting. </div></div>
I agree 100%. Since you have a 260 that you intend on using at longer ranges, I see no need to run 107s with a fast twist
67gr BIBs or 68gr Barts bullets in a 14 twist will give you the best 200yd results.
An even better option, if you are willing to deviate from the 6BR, is the 30BR with a 17 twist shooting the 118gr pills. The Robinette seems to be the best reamer for this setup. Guys are using this in score shooting and they are phenomenal.
But if you have to stick with the 107, I would say you need an 8tw, cut with a 272nk and 104fb reamer.
And if your a believer of the Houston Warehouse results, a 21-22 inch barrel is the sweet spot (6PPC was the tested case).
Re: Optimal 6BR length and twist 107SMK
Pete;
Great to hear from you again. Back some, when you commented on parting with your faster twist .22-250, I had thought (erroneously, it seems) that you had encounterd the same limitation I had with the .22-250; that they heat up too fast and too much for sustained match COF accuracy.
My dream solution for that would be a L-W lightweight tactical barrel, which reportedly sheds heat like a duck sheds water. (at around $700 apiece, a dream for sure...)
I think the 6BR might be a viable Carlos rifle with 70-80gr pills.
I have a slovenly-bored military overrun short 30cal/1:10" barrel that I have often dreamt about chambering for .30BR and pushing 135SMK's through, as a Po' Boy proof of concept project.
Be well;
Greg
Pete;
Great to hear from you again. Back some, when you commented on parting with your faster twist .22-250, I had thought (erroneously, it seems) that you had encounterd the same limitation I had with the .22-250; that they heat up too fast and too much for sustained match COF accuracy.
My dream solution for that would be a L-W lightweight tactical barrel, which reportedly sheds heat like a duck sheds water. (at around $700 apiece, a dream for sure...)
I think the 6BR might be a viable Carlos rifle with 70-80gr pills.
I have a slovenly-bored military overrun short 30cal/1:10" barrel that I have often dreamt about chambering for .30BR and pushing 135SMK's through, as a Po' Boy proof of concept project.
Be well;
Greg
Re: Optimal 6BR length and twist 107SMK
.
I would have a 1-10 twist barrel.
It would allows to use up to 95gr. (and the Sierra MK and Berger VLD are great and accurate bullets) at about 500 yards with great success.
You see, the 95gr. VLD have almost the same BC of the 107gr. Sierra MK!
And, of course, you can use lighter bullets (best in the 80-90grs) too.
The really light 6mm bullets, like 64 to 70gr. are very accurate, but at more than 200 yards (and even that if you are on a windy area) will have a lot of drift.
.
I would have a 1-10 twist barrel.
It would allows to use up to 95gr. (and the Sierra MK and Berger VLD are great and accurate bullets) at about 500 yards with great success.
You see, the 95gr. VLD have almost the same BC of the 107gr. Sierra MK!
And, of course, you can use lighter bullets (best in the 80-90grs) too.
The really light 6mm bullets, like 64 to 70gr. are very accurate, but at more than 200 yards (and even that if you are on a windy area) will have a lot of drift.
Re: Optimal 6BR length and twist 107SMK
I don't know enough about the feeding issues of the 6BR, but I've read enough about the 6BR to know it's an issue folks have raised and have been known to encounter. I Wouldn't presume to advise with so little personal experience.
I don't know enough about the feeding issues of the 6BR, but I've read enough about the 6BR to know it's an issue folks have raised and have been known to encounter. I Wouldn't presume to advise with so little personal experience.
Re: Optimal 6BR length and twist 107SMK
The 6br I have listed for sale has shot bug holes at 200 with the standard 105 Berger match bullets infront of 29.1gr of XBR.
The 6br I have listed for sale has shot bug holes at 200 with the standard 105 Berger match bullets infront of 29.1gr of XBR.
Re: Optimal 6BR length and twist 107SMK
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LRCampos</div><div class="ubbcode-body">.
Yes... the 6BR is very, very hard to make feed from magazine.
Even with the Mike Bryant mods, it still unreliable to feed properly. </div></div>
Isn't that the truth. I gave up hope.
Sharp shoulder + no body taper = hard to make feed.
The only thing I never tried was a repeater with a coned bolt. Maybe that would help, I don't know. I was (and still am) enamored with the 6BR. The inherent accuracy, high quality brass, excellent projectile selection, and long barrel life make it a neat little chambering. But it is what it is. A 6mm Bench Rest, and that is where I left it.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: LRCampos</div><div class="ubbcode-body">.
Yes... the 6BR is very, very hard to make feed from magazine.
Even with the Mike Bryant mods, it still unreliable to feed properly. </div></div>
Isn't that the truth. I gave up hope.
Sharp shoulder + no body taper = hard to make feed.
The only thing I never tried was a repeater with a coned bolt. Maybe that would help, I don't know. I was (and still am) enamored with the 6BR. The inherent accuracy, high quality brass, excellent projectile selection, and long barrel life make it a neat little chambering. But it is what it is. A 6mm Bench Rest, and that is where I left it.
Re: Optimal 6BR length and twist 107SMK
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: brand692</div><div class="ubbcode-body">
But if you have to stick with the 107, I would say you need an 8tw, <span style="font-weight: bold">cut with a 272nk and 104fb reamer</span>.
</div></div>
This. Accuracy will not suffer and you will not have to turn the necks (big plus for me). the reamer fb will be shorter the shorter the bullet obviously if you decide to go another route. When I was looking, I decided on a 1-12 twist for up to 75 gr pills...good luck.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: brand692</div><div class="ubbcode-body">
But if you have to stick with the 107, I would say you need an 8tw, <span style="font-weight: bold">cut with a 272nk and 104fb reamer</span>.
</div></div>
This. Accuracy will not suffer and you will not have to turn the necks (big plus for me). the reamer fb will be shorter the shorter the bullet obviously if you decide to go another route. When I was looking, I decided on a 1-12 twist for up to 75 gr pills...good luck.
Re: Optimal 6BR length and twist 107SMK
Greg,
I had far too many rifles at that time...did I just say that?
The barn burner we discussed was a fluted #7 contour 26" 8"twist 22-250 improved which was re-chambered to 22BR at a hair under 25".
Case capacity rivaling the Swift and you better get it done in 5 rounds or you could take a nap until it cooled.
The 22-250 Savage was set up Rem-Style "no nut" with a Hart straight taper barrel .900 at the muzzle.
Glad to be back,
Pete
Greg,
I had far too many rifles at that time...did I just say that?
The barn burner we discussed was a fluted #7 contour 26" 8"twist 22-250 improved which was re-chambered to 22BR at a hair under 25".
Case capacity rivaling the Swift and you better get it done in 5 rounds or you could take a nap until it cooled.
The 22-250 Savage was set up Rem-Style "no nut" with a Hart straight taper barrel .900 at the muzzle.
Glad to be back,
Pete
Re: Optimal 6BR length and twist 107SMK
I have a 6mmBR Eliseo R5 and it is a repeater. It is a kit gun build around a Remington 700. The magazines are an open front type, wouldn't be good for a tactical rifle. I use it for F-Class and 600 yd prone matches. The lightest bullet that the magazine will work with is 95 gr Sierra. The loaded round has a minimum length it has to be to feed reliably. The lighter bullets just aren't long enough to feed from the magazine.
I have a 6mmBR Eliseo R5 and it is a repeater. It is a kit gun build around a Remington 700. The magazines are an open front type, wouldn't be good for a tactical rifle. I use it for F-Class and 600 yd prone matches. The lightest bullet that the magazine will work with is 95 gr Sierra. The loaded round has a minimum length it has to be to feed reliably. The lighter bullets just aren't long enough to feed from the magazine.
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