Mark,
Could you ask for any kind of procedural penalty to use the Tommygun? I think that'd be cool as hell to use in a competition, and I believe others in the club might think the same.
It might prompt a small change in the club rules, you never know. They might make an exception for those matches with the closer targets.
Remember, it's all about the fun. What's funner than waxin targets with a 1927?