Re: YHM 338 Suppressor on 308?
if your talking about the brake effect being affected by the bore being bigger with the 338 adapter , I highly doubt that you will be able to tell the differance in recoil reduction.
If you have say a 338 YHM can then get another 338 adapter for your 308 , it'll work fine , I have a frind that uses his 338 Surefire can on several rifles incluting a 7mm Weatherby and the 338 brake works great