The best patterning combo I've had was a IC choke from a Benelli Nova that I found in a "grab bag" section of the gun store and screwed into my Benelli M4. It was kindof rough inside, etc. Anyway, it would throw Remington Express 3" 000 into about 8-14" at 30 yards. Every time. I tried Trulok and Briley, and neither IC from them came even CLOSE to doing it. Chokes are as individual as shotguns, I've found. That said, yeah, I tried all the Patternmaster and junk and meh. Sucked. Crappy patterns, and can't shoot slug through that tight a bore. Now? I just use USMC spec M1014 barrels and it has a MOD choke hammer-forged into the profile. No more mix and match, no more choke wrenches, and no more worrying with it coming out/seizing in a combat shotgun.