Dont be too quick to write the chokes off until you've spent some time at the pattern board. Just a few thousandths of constriction can give you an IC pattern and 10 to 15 can often give an IM or even Full. Plus, you get to see how the gun fits and where it hits vs. your point of aim. Good luck.

Agree with Mike. Today's non-tox loads typically shoot tighter than lead shot in my experience