My Heym drilling has no caliber marks on the rifle barrel other than DRGM Plomb which is French for lead , Pat # 60215, serial # 3036, STMG, 2G GBP, Crown with an R on the rifle barrel. Both the S .323 and the .318 shells load and close. I was told the bore is .318. I have been offered a box of 8X57JR 360. Can I shoot that 360 version in this gun or is the case too small ?
Thanks for your help
Thanks for your help
Comment