I have shot .32 SW and .32SW Long in mine-- some case bulge, but ok to fire. I hhave heard that .32 H&R Mags work well also, but I have not fired those-- 7.62X38 Nagant is like $50 a bix at GM-- I may just have to make an order off of SOG or something at the price you got...Did some quick research:
7.62 Nagant is .295 bore
.32 S&W round is .312 diameter
This is safe?!
(I ask because I'm planning to own one in the not-so-distant future and want to be able to feed it!)