Choose a brass screw, preferably old time single slot over phillips that is larger than the bore, smaller than the diameter of the muzzle....about mid way between is nice.
Old guys mix clover (how many under 30 know what clover is?) with oil, chuck the screw in a bit and brace or hand powered drill and gently lap the face of the muzzle, cleaning often and replenishing the clover/oil mix all the while rocking the screw around in a circle so the crown is equal anywhere on the circumference of the bore/land interface.
First timers do much the same but use a prepaired grease based lapping compund, often from brownells including a conical "psuedo brass screw" that costs more and is often called a muzzle lap. It works fine to. The big mistake is first timers chuck it in a hand drill and go at it with 180 lbs of down thrust at 2357 RPM....
Either way works wonders.
Just remember, slow and gentle is how ya treat a gal.
Old guys mix clover (how many under 30 know what clover is?) with oil, chuck the screw in a bit and brace or hand powered drill and gently lap the face of the muzzle, cleaning often and replenishing the clover/oil mix all the while rocking the screw around in a circle so the crown is equal anywhere on the circumference of the bore/land interface.
First timers do much the same but use a prepaired grease based lapping compund, often from brownells including a conical "psuedo brass screw" that costs more and is often called a muzzle lap. It works fine to. The big mistake is first timers chuck it in a hand drill and go at it with 180 lbs of down thrust at 2357 RPM....
Either way works wonders.
Just remember, slow and gentle is how ya treat a gal.
