And IF you can get worked up to the point where you're calling twist rate "Threading", you need to maybe relax just a bit, and quit trying to impress everybody so hard.
"Barrel Velocity (muzzle velocity ?)",......we'll just wait and wonder, on that one.
.......I've been involved with a ".450 Bushmaster" project, at and to some depth. That fat rebated rimmed abortion of a case is a cobbled up (most commonly unavailable)joke, looking for guns to blow up. The AR guys had to go to some sorta' unobtanium bolt for THAT cartridge, too.
Welcome, just knock off your finger pointing "Troll" chit muy pronto, would be my best advice
GTC
Member, Clan of the Border Rats -- “Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it.”- Mark Twain
