Prefered Bullet Weight in a 1:12" Tube

[Savage15]

So I just bought a remingotn 700 SPS Varmint in 308 to build off of and since I reload I was wondering what bullet would be stabilized the best by the 1:12" twist barrel.

If you have specific recipes for this gun that would be great too.

Thanks

 

[roggom]

Re: Prefered Bullet Weight in a 1:12" Tube

168 and 178 hornady amax are excellent. 168 can be purchased in bulk and perfect for under 700. 178's are a bit more expensive, but will do everything you need from target to long range hunting (deer and antelope).

 

[Twist Fast]

Re: Prefered Bullet Weight in a 1:12" Tube

The sooner you quit thinking weight and start focusing length,the faster clarity will be granted.

12" capably covers lots of territory.

 

[ccoker]

Re: Prefered Bullet Weight in a 1:12" Tube

I have a gun that started off as a base LTR with a 1-12 twist
I would suggest starting with 175 SMK, 2.80 COAL, CCI or Fed natch primers and a medium charge of Varget.

I run 44.2 and that gets my 2575 out of my 20" barrel and will get me to 1K

I have ran 165 Accubonds with 45.2g and both loads hit the same POA CEO
250 to 500. The 175 suffers from less wind drift of course. For hunting under 400 I run the 165 ABs.

 

[Twist Fast]

Re: Prefered Bullet Weight in a 1:12" Tube

Holster the AccuBomb and 175SMK and scoot 155 Scenar's with '15,for the win.

They are an exceedingly nice balance of BC,projectile weight and terminal affects.

 

[mattr25]

Re: Prefered Bullet Weight in a 1:12" Tube

Different loads stabilize at different ranges. Are you are going to be punching paper at 100 yards or are you looking at longer ranges? Mine loves the SMK 175's. I tried the 155 Scenar's and they were fine at closer ranges but tumbled at 800 yards so I would not suggest them for any longer ranges. Overall the 175's are my go to round.

 

[kristian55]

Re: Prefered Bullet Weight in a 1:12" Tube

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Twist Fast</div><div class="ubbcode-body">The sooner you quit thinking weight and start focusing length,the faster clarity will be granted.

12" capably covers lots of territory. </div></div>
<span style="font-weight: bold">focusing length</span> YES,only length, length, length ....

 

[ccoker]

Re: Prefered Bullet Weight in a 1:12" Tube

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Twist Fast</div><div class="ubbcode-body">Holster the AccuBomb and 175SMK and scoot 155 Scenar's with '15,for the win.

They are an exceedingly nice balance of BC,projectile weight and terminal affects. </div></div>

I have several 150s, ABs and Amax and couldn't get them to shoot well. I have considered the 155 Scenars but according to the calc I need to drive them faster than I think I can get out of the 20" tube to be better than the 175s..

I haven't tried them and could be wrong..

 

[fireguyty]

Re: Prefered Bullet Weight in a 1:12" Tube

155 Scener is a great bullet. Works good with Varget, and better with IMR 8208 XBR.

 

[Savage15]

Re: Prefered Bullet Weight in a 1:12" Tube

Thanks guys for the responses they are all very helpful.

What bullet length should I be shooting out of my barrel in order for it to stabilize properly?

Thanks

 

[Sandbagging]

Re: Prefered Bullet Weight in a 1:12" Tube

Round holes are stabilized properly,keyholes are not.

Rest assured that the 155 won't tumble at the 800yd line,even at sealevel in a 12".

Ummmmmm...there just might be mechanical advantages inherent the 155Scenar,as it shares the 175SMK's BC,but obviously can be driven faster,due the 20gr gross mass discrepency.

If only for conversation and laughs,the 155 is pictured here between a .284" 175NPT and a .308" 165XLC. The 155's modest bearing surface,sleek profile and modest gross weight,allows it to slap around heavier offerings routinely.

In a 308Win,whether 10,11.25/7 or 12...it's typically my first choice.

 

[Savage15]

Re: Prefered Bullet Weight in a 1:12" Tube

sounds good,I think my starting bullets will be the 155's the 175 smk and probably the 168 A-Max and maybe the Hornady 178 HPBT (.530 B.C.)!!

 

[Boomholzer]

Re: Prefered Bullet Weight in a 1:12" Tube

It's a wide window. Optimal paper-calc rotational velocity is not going to be a key player.....just sufficient forward & rotational velocity down range.

You have mass, velocity, BC, and component cost. I assume that's a 26" tube so you have the extra push in length on your side. Keep the x-bullet supersonic to range and in given atmosphere and you'll be fine, stability wise. If you go long/heavy and slow or with a lossy BC; issues could arise.

Putting all that together for dope and comparitive BE is part of the reloading task or application. Stability is a lower factor.

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Different loads stabilize at different ranges</div></div>
The "going to sleep". Forget that.

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">(.530 B.C.)!!</div></div>
I'd be more excited with MV and shorter range prints.

 

[oneshotkyle]

Re: Prefered Bullet Weight in a 1:12" Tube

i have a 308 sps varmint with a 1 in 12 barrel.
45.5g varget in new lapua brass with 155scenars with shoot 1/2moa
at 2850fps. i have been playing with berger 155.5 fullbores and varget. they are starting to shoot better at my highest loaded charges of 47g varget. at 2910fps with them they are about 30 inches less drop at 1000k. tomorrow i will be testing bergers at
47g and higher charges, and i expect things to get better.

calculate 175smk's with a muzzle velocity of 2750 vs 155.5 berger fullbore's at my 2910 and you'll see the bergers have the same wind drift with 10mph winds and way less drop. plus less time in flight. i think i am being pretty fair at figuring 175smk's @ 2750fps. all of this was figued out on my FFS software.

 

[mattr25]

Re: Prefered Bullet Weight in a 1:12" Tube

Sand Bagging, maybe my 155's were not tumbling at 800 yards but they were hitting the target sideways and were all over the place so call it what you will. I am kinda new to reloading so maybe it was just something wrong in my load and it was pretty windy that day. They did shoot well at 100 yards though. I had some 1/2 MOA groups.

 

[JayCarver]

Re: Prefered Bullet Weight in a 1:12" Tube

My 1in12 SPS shoots 175 SMK's and 185gr Berger VLD's good.

 

[JayCarver]

Re: Prefered Bullet Weight in a 1:12" Tube

I should mention the VLD's tend to like to be seated right on the lands which means there not mag friendly but the SMK's don't mind alittle jump.

 

[Savage15]

Re: Prefered Bullet Weight in a 1:12" Tube

Thank you one shot Kyle for your recipe. What's your C.O.A.L. For your 155 scenar load? Also what primers do you use?

 

[AzNooB]

Re: Prefered Bullet Weight in a 1:12" Tube

I've used 175gr SMKs and they worked out well.

 

[roggom]

Re: Prefered Bullet Weight in a 1:12" Tube

Savage, do you plan on chopping your barrel? What is your realistic goal for shooting? Just some simple questions, in that some folks spend a lot of time and money working up loads for a shot they will never take.

For each of the bullets you are shooting there will be at least (3) accuracy nodes at mag length and who knows at max length. With a 26" tube, you will not have an issue launching any of the three. Just take some time and study bullet construction, ogive (tangent, secant) and seating depths.

My rifles serve dual duty, hunt and shoot. So I seat all of my bullets to mag length. My choice in bullets are those with a tangent ogive, as they tolerate jump much better. My bbl's are a 20" 1:12 and chopped 22" 1:12, so although the 155 are kick ass, my bbl is not long enough to generate enough velocity. BC is a factor of several variables and velocity is one of them. So this is the reason I asked if you will chop your bbl. It would suck to work up some 155, 's and then have to go to something else later.


As for right now, choose some brass, and stick with that. I have tried many and found Lapua to be the best for my type of shooting. For the cheaper stuff, Remington had the max reload life.

You can go to bullet samples and pick up batches of bullets and try them out. http://www.bulletsamples.com/. It is much cheaper than buying boxes of 100.

Just trying to save you some time and money. It is easy to get hung up on load development. I'd rather be out shooting steel or harvesting game.

 

[oneshotkyle]

Re: Prefered Bullet Weight in a 1:12" Tube

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Savage15</div><div class="ubbcode-body">Thank you one shot Kyle for your recipe. What's your C.O.A.L. For your 155 scenar load? Also what primers do you use? </div></div>
2.870 is all i can get and still get the bullets to feed properly. i use federal 210 primers also.
one more thing to consider about the 155 scenars. they are about .080 longer than 155 palma's and 155.5 berger fullbores.
when i load the scenars at 45.5g varget it is pretty well compressed and puts deep rings around the bullet's. they do shoot excellent even with that. my fullbore and palma's at 47.0g are compressed but no where near as much as scenars.

 

[Savage15]

Re: Prefered Bullet Weight in a 1:12" Tube

Those are very good points. My goal is to accurately shoot steal in some decently harsh conditions out to a grand. I wasnt planning on chopping my barrel since my range is very windy I wanted the longer barrel to get higher velocities therefore less wind drift.

Yes, I am aware that 2 extra inches doesnt make that much of a difference and that there are much flatter shooting calibers I could have chosen.

Once I find an accurate load I will most likely stick with it for a long time.

Thanks oneshotkyle also have you ever loaded for 155 amaxs if so what were your recipes?

 

[mattr25]

Re: Prefered Bullet Weight in a 1:12" Tube

Lapua brass, 175 smk's, Federal primers, 44.8 grains of Varget, 2.850 OAL works good for me out of a 1:12 twist.

 

[oneshotkyle]

Re: Prefered Bullet Weight in a 1:12" Tube

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Savage15</div><div class="ubbcode-body">
Thanks oneshotkyle also have you ever loaded for 155 amaxs if so what were your recipes? </div></div>

i haven't tried any amaxs.
the palma's did not perform any better for me yesterday. on the other hand the bergers shot about 3/4 moa and i got them up to 2960fps. so i'll continue pushing them a little harder. at the end of the range session i shot some of the scenars and they still shoot 1/2moa and better but only at 2850fps. lol. i think i need to load them scenars in some once fired brass and see if i can cram more varget in them and up the scenars velocity a little. even at there 100fps loss to the bergers they are still shooting a little better groups