You might check with Mike Orlen about installing a permanent soldered choke sleeve. I'm thinking of sending off a gun of mine with cylinder bores to have chokes put in both barrels. BTW I consider modified to be as much choke as you'll ever need in a .410. If I ever get my gun off to Mike to be rechoked it'll be M/Sk.
Steve


Approach life like you do a yellow light - RUN IT! (Gail T.)