.308 - 1:10 or 1:12

T

Trigger556

Private
Minuteman
Nov 5, 2009
9
0
43
#1
I am about to embark on my first precision rifle build. I would like to stay with the Remington 700 platform and a 20" barrel. I was all set to pick up an SPS when I saw an AAC-SD in the shop. The only difference I see is that the barrel is a 1:10 instead of a 1:12 and is threaded. I don't know that I'll use the threads, even for a muzzle brake, definitely not for a can. Should I just stick with the SPS, or is the AAC a better barrel?

Thanks in advance,
Trigger
 
#3
Re: .308 - 1:10 or 1:12

The AAC version doesn't have a "better" barrel, just a different barrel. They were trying to have something setup out of the box for suppressor users. The 1:10 is the popular choice for subsonic ammo.

Pick the rifle with the features that best matches what you intend to do with the rifle. That includes getting a rifle with the twist rate you need for the ammo you want to shoot.

Hope this helps.
 
#4
Re: .308 - 1:10 or 1:12

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: offroadr1</div><div class="ubbcode-body">1:10 will shoot the heavies better. </div></div>

The question is....can you tell.

Between 1:10 and 1:12 there is a lot more that affects the accuracy of the ammo when we are dealing with 175gr bullets (the heaviest most shoot).

I don't believe there is an accuracy different between the 1:12 SPS barrels and the 1:10. I won't have a good side-by-side for a couple more months when I install the B&C stock on the AAC-SD. Then it will be a more accurate comparison.

Now the 1:10 is a better choice for 208gr Amax loads, but how many are actually shooting those through an AAC-SD?
 
#5
Re: .308 - 1:10 or 1:12

Thanks, looks like I'll just stick with the 1:12 SPS. I'll be engaging targets out to 500-600 meters from the prone. Just want to train fundamentals with it.
 
#7
Re: .308 - 1:10 or 1:12

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SSG Trigger</div><div class="ubbcode-body">I would like to stay with the Remington 700 platform and a 20" barrel. The only difference I see is that the barrel is a 1:10 instead of a 1:12 and is threaded. Should I just stick with the SPS, or is the AAC a better barrel?
</div></div>


IIRC - the 1:12 twist SPS only comes in a 26" barrel. To get the 20" SPS you want, you're stuck with a 1:10 twist. The only 20" 1:12 option I know of is the LTR, which is nearly double the price od the SPS.
 
#8
Re: .308 - 1:10 or 1:12

The 20" SPS Tactical is also a 12 twist. The AAC-SD is the only 10 twist "tactical" rifle they make.
 
#9
Re: .308 - 1:10 or 1:12

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 9sigman45</div><div class="ubbcode-body">
IIRC - the 1:12 twist SPS only comes in a 26" barrel. To get the 20" SPS you want, you're stuck with a 1:10 twist. The only 20" 1:12 option I know of is the LTR, which is nearly double the price od the SPS. </div></div>

Negative.

The SPS-Tactical is 1:12.

The SPS-Tactical AAC-SD is 1:10.
 
#12
Re: .308 - 1:10 or 1:12

I've shot the both the 175 gr. SMK and the 180 gr. Nosler Accubond (both Black Hills loads) out of my SPS-Tactical out to 600 + yards. I haven't noticed an appreciable difference in accuracy between these and the 168 gr. that I shot at a class. They all shoot better than I can in this rifle... sometimes I surprise myself and get to see what the potential could be if I could maintain some semblance of consistency.

FWIW
 
#14
Re: .308 - 1:10 or 1:12

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: penumbra</div><div class="ubbcode-body">twist affects balance and accuracy:

http://riflebarrels.com/articles/bullets_ballastics/bullet_imbalance_twist.htm </div></div>

Very interesting read, I never knew that at all. I just thought the faster twist was needed for heavier bullets but didn't affect accuracy.

Now I know why benchrest guns are such slow twists...
 
#15
Re: .308 - 1:10 or 1:12

I've used 10 and 12 twists with 168 and 178 Amax. I'm sure someone somewhere can quantify the difference but not sure the difference would be much.

My current F-Class rifle is a 10 and I use 168Amax.

It doesnt seem to be too big a handicap, sometimes somethings can be over thought.
 
#16
Re: .308 - 1:10 or 1:12

I will refer you back to my original post in this thread.
wink.gif
 
#18
Re: .308 - 1:10 or 1:12

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SSG Trigger</div><div class="ubbcode-body">I am about to embark on my first precision rifle build. I would like to stay with the Remington 700 platform and a 20" barrel. I was all set to pick up an SPS when I saw an AAC-SD in the shop. The only difference I see is that the barrel is a 1:10 instead of a 1:12 and is threaded. I don't know that I'll use the threads, even for a muzzle brake, definitely not for a can. Should I just stick with the SPS, or is the AAC a better barrel?

Thanks in advance,
Trigger </div></div>

Do yourself a favor, since you have no need for a can, and get a 26" barrel. Don't handicap the .308 anymore than is necessary.
 
You must log in or register to reply here.

Similar threads

SkyScrapin
SOLD SBR Bolt Action 12" 277 Fury
Replies
4
Views
738
Henry Morgan
Henry Morgan
J
New to forum + New rifle build
Replies
0
Views
115
JTF91
J
M
308 - 1 in 10 vs. 1 in 11.25
Replies
2
Views
735
Supersubes
Supersubes
Solidbuilt
Too short? .308 Midrange setup
Replies
5
Views
421
thedude824
T
Scooter1942
Which used rifle: Remington 700 AAC-SD 6.5CM or Bergara B-14 HMR in .308?
Replies
3
Views
347
earthtrekker1775
earthtrekker1775
Top Bottom
Back
Home
Forums
Merch
Alerts