308 1:12 twist

[neoinarien]

So I want to shoot out the barrel on the rifle I'm planning on getting (figure it will take several years given work, marriage, kid). It's a 22" 308 with a 1:12 twist (yeah... I know...).

So what should I be spending my Christmas money on? What can a 1:12 stabilize. I

 

[Bradley]

Re: 308 1:12 twist

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2157070

I shoot 175smk and 178 amax in mine with good results.

 

[desertHK]

Re: 308 1:12 twist

There is nothing wrong with 1:12" twist. Mine stabilizes everything to the 208 AMAX out to 1K easily. It will be fine. Happy shooting.

 

[Furtaker_.223]

Re: 308 1:12 twist

I dont mean to hijack this thread, but I am looking at the 208 AMAX.

DesertHK, do you have any good loads to share to start them out at? Just to try and then tweak them to my rifle.

 

[desertHK]

Re: 308 1:12 twist

There are a number of recipes for the 208 AMAX. In fact there are a couple threads dealing with this particular projos. I believe they are under the beyond 1000 section.

For the 208 AMAX, I use RL15. It has been a while, but I believe it's somewhere around 41 grains or so. You must work up your load accordingly.

For the 175 SMK, I use IMR4064 at around 44.2 grains for my bolt gun and 43.8 grains for my gas gun

For the 155 scenars, I use Varget at 48 grains. This is an insane load, but extremely accurate. This is one you must work up the load to your rifle. Good luck and be safe.

 

[Furtaker_.223]

Re: 308 1:12 twist

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DesertHK</div><div class="ubbcode-body">There are a number of recipes for the 208 AMAX. In fact there are a couple threads dealing with this particular projos. I believe they are under the beyond 1000 section.

For the 208 AMAX, I use RL15. It has been a while, but I believe it's somewhere around 41 grains or so. You must work up your load accordingly.

For the 175 SMK, I use IMR4064 at around 44.2 grains for my bolt gun and 43.8 grains for my gas gun

For the 155 scenars, I use Varget at 48 grains. This is an insane load, but extremely accurate. This is one you must work up the load to your rifle. Good luck and be safe.</div></div>

With your 155 scenars and 48 grains of varget, did you get any pressure signs? I have taken mine to 46.5 grains of varget W/150 sierra spitzers and it loved it. No pressure signs.

 

[head2h2o]

Re: 308 1:12 twist

It will stabilize 175's with no problem. I talked to one guy on here a while back that had gotten 220's to stabilize good as well, but nothing higher. Anything heavier would better be suited to a 1 in 10. We were discussing pushing the 240's with a 1 in 10. The books say you need 1 in 9. I can personally tell you that is bunk and I have a 300RUM that says otherwise. Therefore, you can get away with a heavier bullet with the slower twist barrels than the reloading manuals suggest.

 

[Emilio]

Re: 308 1:12 twist

I have a 20" and a 25" 1-12 twist. The 20 will shoot 168 and175/178 just fine. The 25 will shoot 155-178 just fine. Nothing wrong with the 1-12.

 

[Brasscow]

Re: 308 1:12 twist

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: furtaker_.223</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: DesertHK</div><div class="ubbcode-body">There are a number of recipes for the 208 AMAX. In fact there are a couple threads dealing with this particular projos. I believe they are under the beyond 1000 section.

For the 208 AMAX, I use RL15. It has been a while, but I believe it's somewhere around 41 grains or so. You must work up your load accordingly.

For the 175 SMK, I use IMR4064 at around 44.2 grains for my bolt gun and 43.8 grains for my gas gun

For the 155 scenars, I use Varget at 48 grains. This is an insane load, but extremely accurate. This is one you must work up the load to your rifle. Good luck and be safe.</div></div>

With your 155 scenars and 48 grains of varget, did you get any pressure signs? I have taken mine to 46.5 grains of varget W/150 sierra spitzers and it loved it. No pressure signs.</div></div>

I'm at 47.6gr of varget with 155 scenars and the only pressure signs visible are the loose primer pockets after 3-7 firings. Fairly safe assumption than the load is overpressure, but it's a fucking laser beam

 

[sobrbiker883]

Re: 308 1:12 twist

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: neoinarien</div><div class="ubbcode-body"> 308 with a 1:12 twist (yeah... I know...)
</div></div>

You know what, that 1:10 has become the favored selection but that 1:12 is and has been perfectly sufficient for .30 rifle and has most likely won more matches in more disciplines using bullets of all different weights than there probably are 1:10 tubes in existence at this moment?

 

[LoneWolfUSMC]

Re: 308 1:12 twist

I have run the 208's out of my 1:12 AE they make nice little holes at 200 (as far as my workup has gone). RE17 is well suited to that heavy pill in the .308.

A 1:12 is a good all around tube, but with the stuff we shoot for long range a 1:10 may be a better bet. That is what I am running on my AR10, but I have yet to shoot any 155's through it to see what the bottom end looks like. It shoots 168's just fine and seems to like 178gr Amax.