opening wallet is not hard, i have more shells in a wood crate then I will ever use....... just havent been happy with the pattern though it has dropped all my turkeys....... if my calculations and research is right the undertaker, is .725. So I guess anything smaller might help a little, it just seems to open pattern. I see all these shots in a 10" or the vitals, but mine is just not delivering with the undertaker! [&:]