I tried a Modified choke too and it hardly even hit the box so not sure what it was doing. One pellet hit right where I was aiming. A 2 others were a few inches down then the rest didn't even hit the box so not sure where the other 12 went.

The full choke seemed better but still not that great. A buddy that used to have a gun just like this told me to try #1 buckshot which I've never used but might have to try.