Who made this gun for you? What are the other particulars to go with the Krieger barrel?lpreddick said:re your choice of bullet weight...a 12 twist does wonders with bullets weighing 60,62,63 and 64 gr. i'v read that bullet stability and accuracy can be best just at it's margin of being unstable in flight. my 12 twist krieger consistently prints groups in the ones and often in the zeros...0.075 in. with 64 bergers and n 540 powder. love this cartridge for varmint shooting...got 26 ghogs WITHOUT a miss last year. have a 14 twist being made presently and plan on shooting 52 fowlers to start and maybe 60 bergers if they stabilize.