I recently purchased a very well maintained S&W 41 with a 5.5in barrel. I will be using in in my clubs upcoming bullseye pistol league(50ft). I've tried every imaginable ammo up to and including the very expensive Lapua Signums. Out of a rest at 50ft, the best groups hover around 1". Is this the kind of accuracy I should expect or am I looking for a new barrel? Also where would be the best places to find aftermarket for the 41.(barrels,grips ect...) Thanks for any help!!