The Mark II, I pick up is 26 years old . A 2 inches group from a rest is the best I can get at 50' ... Can the barrel be replace, or do you need to buy a whole new upper ? What is my best course to go ??? Thanks for your Ideals..
Make sure that the bore is clean. If ammo with soft lead bullets have been used, such as Remington, the bore may be fouled with lead. And yes, experiment with different brands of ammo. My MK I loves the Federal bulk ammo but my MK II hates it.
+1 on all of the above suggestions, starting with a good cleaning.
I've had badly leaded barrels on both Ruger autos and Smith revolvers. Remington ammo, especially Thunderbolts, seem to be blamed for leading quite commonly. Cleaning those slivers of lead out of the grooves seems to improve accuracy for some reason... 8)
I'm willing to bet that if you give the bore a good cleaning, then test a variety of ammo, you'll be very happy with your new piece!
Unless the crown is damaged, the MKIIs typically have very good accuracy potential.
yessir, as said above,,,,, the barrel needs a GOOD clean ( Lewis lead remover will do the trick), and check the crown, and yes, the ammo will make a BIG difference, we stay away from "bulk" ammo, thats for plinking ,not serious target shooting......doubt if you need a "new " barrel...........