Hey 10mm enthusiasts, I live in the communist state of Maryland and need a 6" barrel and hot loads to hunt deer. All barrels i'm looking at will work, however, i was confused as to why each one had different twist rate. Glock 6" is 1x9 LW 6" is 1x15 KKB is 1X20 Which one would shoot a underwood 200 grain jhp hot load better? I did make a mistake with this with a rifle once. I purchased a 1x10 twist for a 243. Can't shoot 100grain bullets at all. I'm worried that a 200 grain wouldn't shoot well out of a 1x20 twist.