On these pistols we are so fond of I find several things that contribute to accuracy. A good even crown is absolutely critical, if there is any dings or other damage it ain't gonna shoot accurately. Having the arbor bedded properly on the open tops, same gun each time it's put together, a good smooth forcing cone, consistent loading procedure, no rings cut from the projectile, I have my revolver chambers chamfered so the ball is compressed into the chambers. No weight is removed during loading.If all this isn't enough the most important thing is PRACTICE. Get to know what the gun is capable of and what the shooter is capable of.