I know of a few shotgunners that really like the Patternmaster chokes, could this be what you are thinking about?These chokesare known for their exceptional performance at long range. I would suspect that a top quality custom choke like this combined with the most potent load available, Heavi-Shot Dead Coyote, would be awesome. I know that one of the sales reps for Heav-Shot said they were getting consistent one shot kills at 70+ yards with these 12 gauge loads! That's simply awesome!