I have seen a couple, the first one was in a 1985 Gun Digest. Never had the cash to get someone to do one up for me but it would be awesome I think!
Cat
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Anytime I figure I've got this long range thing figured out, I just strap into the sling and irons and remind myself that I don't!
I guess one could bush the breech block and relocate the firing pin hole , build a firing pin for rim fire , install a rim fire barrel and done . Could feasible be done on an existing #1 just lots of work .