7 or 8 twist .308 win

[dick]

I plan to build a 16" .308 win for double duty sub and supersonic. I am sure an 8 twist will work fine, I was wondering if any one has any experience with shooting 175gr matchking at approx. 2500fps from a 7 twist.(Accuracy Wise) Any supersonic info in a 7 twist would be apprieciated. I would like to stabilize a 240gr mk at subsonic speeds also, thats why I am leaning towards a 7 twist.

[lskok]

Won't a 1-8 twist stabilize a 240 gr at subsonic speeds?

[rsilvers]

By the way, AAC makes 308 in 1/8 twist:

http://www.midwayusa.com/product/897445/advanced-armament-co-aac-barrel-remington-700-medium-contour-308-winchester-18-1-in-8-twist-5-8-24-threaded-muzzle-matte

[ohnomrbillk]

By the way, AAC makes 308 in 1/8 twist:

http://www.midwayusa.com/product/897445/advanced-armament-co-aac-barrel-remington-700-medium-contour-308-winchester-18-1-in-8-twist-5-8-24-threaded-muzzle-matte

Midway is out of stock. I'd have Spook build one. He is the man.

[Titleiiredneck]

Midway is out of stock. I'd have Spook build one. He is the man.

I agree, and he uses alot better barrel too!

[rsilvers]

Ours are nitrided and threaded to a drawing.

[Titleiiredneck]

Match grade stainless will always be better, besides I doubt they are done to the same precision. Nitrade is ok if your running in a enviroment that requires it but otherwise its just a waste of time.

Before you wouldnot say who made the aac barrels, so what mfg?

[ds762]

Match grade stainless will always be better, besides I doubt they are done to the same precision. Nitrade is ok if your running in a enviroment that requires it but otherwise its just a waste of time.

Before you wouldnot say who made the aac barrels, so what mfg?

they make them from scratch round stock .. didn't you get the memo? :tongue:

[ds762]

Midway is out of stock. I'd have Spook build one. He is the man.

+1

:wink:

[rsilvers]

The reason people use stainless is because it has less throat erosion than normal blued or phosphated 4140. The normal way to reduce that erosion in chrome-moly is chrome plating, but that adds a layer which may harm accuracy.

Nitriding chrome-moly results in even more corrosion and erosion resistance than stainless but without the accuracy-robbing layer of chrome plating. Stainless is not better than nitrided chrome moly steel, and AAC barrels are match grade. Also, AAC barrels are engineered to a drawing based on having the actual Remington 700 action drawings, and with the threads that are compatible with sound suppressors. If I said who makes them, our competitors would make a beeline for the same company and skip years of expensive testing I had to do to find who was best.

[dick]

Spook, has been commissioned for the barrel build. 16", 8 twist, stainless, carbine gas system, for DPMS LR-308. The plan is to make it cycle with out help, I will be using an adjustable gas system to regulate the full power ammo.

[sha-ul]

The reason people use stainless is because it has less throat erosion than normal blued or phosphated 4140. The normal way to reduce that erosion in chrome-moly is chrome plating, but that adds a layer which may harm accuracy.

Nitriding chrome-moly results in even more corrosion and erosion resistance than stainless but without the accuracy-robbing layer of chrome plating. Stainless is not better than nitrided chrome moly steel, and AAC barrels are match grade. Also, AAC barrels are engineered to a drawing based on having the actual Remington 700 action drawings, and with the threads that are compatible with sound suppressors. If I said who makes them, our competitors would make a beeline for the same company and skip years of expensive testing I had to do to find who was best.
Do you make em for a Savage pre-fit?:grin:

[Alleycat]

Do you make em for a Savage pre-fit?:grin:

http://www.gunshack.com/groupbuy?product_id=164

[MIKEONE]

http://www.gunshack.com/groupbuy?product_id=164


Any idea if I could get a shorter barrel with that same profile like a 6 or 7in?
Obviously it wouldn't work with the group buy or??

Thanks,
Mike

[sha-ul]

http://www.gunshack.com/groupbuy?product_id=164

pretty nifty:grin::grin:

ETA, how much to get it nitrided?

[sha-ul]

I should add, that is a LOT cheaper than the Shilen bbl I put on my Savage.