I know, that according to the rule book neither calibers are legal for the sanctioned sport, simply because they are less than .38/9mm. However, it is possible to make power factor with either one on the top end. Of course, I guess it's a club/match thing. I guess you can shoot the scenario with anything, just not get "scored" with it, so we have nothing to worry about locally- let 'em shoot.
We have had a couple of competitors use the .327 in some matches and did about par with with .38 shooters.
I might try a .32-20 next match upcoming since I now have some speedloaders that will fit it. Just to try it for grins.
I have fun in the matches no matter what and try what works and what doesn't. Kinda like how the last match two gentlemen used single actions- one Ruger and the other one a Colt SAA- those fellers had a lot of fun.