Quote Originally Posted by tbonesmithicon View Post
The .303 barrels are 5 groove and are made to a major bore diameter of .310 instead of .311, twist is 1:14".
The .308 barrels are 4 groove and 1:14" twist.

Headspace is slightly adjustable on the .303 barrels, but they are not short chambered.

That's about all I have got.
WHAT!!

1-14 twist for both!! I guess they expect us to only shoot the light stuff.

Tbonesmith, Took a look at your website and see the Armalon barrels you have on there. What are the specs on the 303 british?