Get a gun smith to round off the firing pins at the front without
shortening them too much and to check the protrusion length.
A good gunsmith should be able to adjust them to suit both
the rifle and shotgun primers.

Having a primer or be punctured is not good for the rifle
and sends hot burning gases and other crap[ into the action
which means every time it happens the gun should be striped and cleaned.

500 Nitro