1) SCRUB the bore until it shines.
2) When shooting ANY levergun, keep in mind it was never designed to shoot "tight groups", since game animals don't normally stick around very long if the first shot's a miss.
Zero for the first shot from a cold bore, either clean or dirty, YMMV.
3) When zeroing any rifle that has a two-piece stock design & especially an underbarrel tube magazine, never allow any part of the rifle to touch anything other than a part of your body - only hands and/or shoulder, and certainly never a front or rear rest, or the benchtop.
Brace your body & hands, but hold the rifle very tightly down with the hands & hard into the shoulder while keeping the trigger finger free to fire the rifle.
Via con Dios.
.
2) When shooting ANY levergun, keep in mind it was never designed to shoot "tight groups", since game animals don't normally stick around very long if the first shot's a miss.
Zero for the first shot from a cold bore, either clean or dirty, YMMV.
3) When zeroing any rifle that has a two-piece stock design & especially an underbarrel tube magazine, never allow any part of the rifle to touch anything other than a part of your body - only hands and/or shoulder, and certainly never a front or rear rest, or the benchtop.
Brace your body & hands, but hold the rifle very tightly down with the hands & hard into the shoulder while keeping the trigger finger free to fire the rifle.
Via con Dios.
.