I have a 14.5" heavy tapper MGM in .243 Win I am shooting 55 & 58 Gr bullets out of it. It shoots pretty darn good I have shot sevral sub 1" groups and 4 or 5 in the .75" range. The gun most likely shoots better than I can shoot it. Using Varget and H4895 as powders. Recoil is not bad at all. The muzzle flash is pretty good though.