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/897...d-muzzle-matte

[ohnomrbillk]

Originally Posted by rsilvers

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

http://www.midwayusa.com/product/897...d-muzzle-matte

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

[Titleiiredneck]

Originally Posted by ohnomrbillk

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.

[ds762]

Originally Posted by ohnomrbillk

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

+1

[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.