I'm thinking or hoping at least that twist had less to do with your blow ups than a bad barrel.
I've shot a few hundred of the blitz kings in 50 gr in a Colt 1/7 with no issues and I'm pretty sure I shot some Winchester White box 45 gr hollow points in the same barrel. I know I shot them in a 1/8 Krieger.
I've had a few Colt 16" pencil barrels and 1, 14.5" Colt barrel along with a buddy who has a few himself. I used to shoot 40 and 50 gr bullets at coyotes and was always looking for a "better" bullet. My buddy still prefers the 50 gr American Eagle hollow point, which I know I shot at least a few thousand rounds in all of my AR's cause we ordered them by the case for $149/1000 shipped. We ordered quite a few cases and shot them for everything.
But I shoot 77gr SMK's or NCC's now, they handle wind better and kill very well, that's why I like 1/7 twisted barrels.
There is also this bit of info, backed up by more than one AMU unit, that if shooting the heavier pills, the 7 produces better longer range groups more consistently, than what a BR shooter would do , IE go to the least twist required.
I know that in comparison a 7.7 twist vs a 7 twist and sample of lets just say more than one sample, that the 7 gave us consistently higher scores and smaller groups on the 600 yard line. The 7.7 should suffice. The 7 should be overstable...
Dont' know why, just did and so roll with what works vs arguing how it should or shouldnt by calculation etc...
