Re: 6.5 x 47 rechamber question
I've made a half-dozen or so 6.5 Grendels so far on worn out 6.5-284 high-power barrels. Cut 5 inches off the chamber end and there's still plenty of meat for a good 24" barrel. I made most of them into AR barrels and they were all great shooter.
I really like the Grendel, but I don't know if I'd choose it over the 6.5X47 in a bolt action. The grendel has its place in the gas guns as it offers better energy figures with a decent trajectory, and in my case I built one on a 527 Carbine for my daughter's first deer rifle (she's 3 right now!) but I think that 6.5X47 would be a great one on the handgun frame.