Changing chokes is over rated to me. Yes you could optimize your choke configuration theoretically, on every target, if you had screw in chokes. I shoot a full choked .410 model 42 for 90% of my sporting clay's. The other ten percent are classic pump guns for fun or a side by side. A center pattern hit si the same for 12 to .410. Only your margin of error is different. Good luck in your quest. 90% of the fun in buying is the looking at likely candidates.