Trickymissfit
Well-Known Member
The Sherman will make 3200' with a 26" barrel and has approx. 11% more capacity than a std. 6.5-06 and 5% more than an A.I. That is why I questioned the 3100' with the improved Mauser case. The barrel on my Sherman has lasted over 1500 rounds and still shoots under 1/2 moa. I think the reason is the neck length and shoulder angle are better than the .284 case, which keeps the flame point contained better inside the neck rather than in the throat. I have heard of 6.5/.284's going south with less firings but have never owned one so can't say for sure.....Rich
I suspect that there's more velocity still in the Sherman case! I may build a 6.5x57AI out of a .260 donor barrel just to actually see what it can do. I do know that the 7x57AI is a very efficient round, and is known to proce some serious velocities, but still never expect it to run with a .280 or the 6.5-06 family
I've heard of guys loosing a 6.5/.284 barrel while doing load development! It's in the case design like nearly all Winchester case designs. Yet most guys will never admit this issue.
gary