One thing to keep in mind is that a given load/choke combo will shoot differently with the first shot compared to second, third, forth shots. I started shooting 4 shots of the very same shell/choke, starting with a clean barrel and letting it cool down between each shot. Kinda expensive but you can Learn a lot. For instance, my 11-87 likes (patterns better) Fed Heavywt. #7 with Trulock choke that has been fired one time, gun & choke. My BPS "likes" the same load in a CLEAN barrel & choke. You won't know this until you shoot a few rounds like that.