i have a model 1894 marlin 44 40 that shoots .427 bullets well. i drove a bullet through the bore it came out .420 with .423 grooves. is a .430 hornady jacketed bullet too big for this rifle? my cast loads with cowboy 200 gr bullets are slightly subsonic i dont know if i can get a bullet to go 1600 or so for 200 meter rams, not my cowboy bullets anyway.