If I read the OP correctly, it's a vintage Marlin .32 Rimfire, not a .22. I can understand wanting to use that gun with modern ammo in CAS.

If the .32 Marlin doesn't have collector value, it possibly could be made into a CAS .38 Spec. Those loads are low pressure. The firing pin/bolt would need some fabrication. And, of course, if it was mine, I'd stay away from +P ammo and loads hotter than typical CAS fodder.

I'd call the vendor link I posted earlier and if the conversion is possible they'll tell you.

Let us know what you find out.

I have a super slick 1894 Cowboy Competition .38 Spec. set up for CAS. Action was already slicked up when I bought it used. I drew working drawings of high end Winchester checkering, sent the wood to Errol Case in Mo. I eventually graduated to '73's. This is the slickest Marlin I've ever handled.

DF

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Last edited by Dirtfarmer; 04/19/14.