[pilgrim,wknitro,
I have encountered 9.3x72R rifles with groove dia. as small as .352" and have a cartridge in my "pile" that has an outside lubricated bullet of well over .368"(as I recall-.374-375). one of mine is .358" and it seems that a good many are that dia.My late friend and mentor Gene Enterkin ran a custom ammo business for many years, and he reported that he encountered more with .362"( and used .364" cast bullet)than any other diameter.As a matter of interest, the owner of one of the ones with .352" barrels, used selfmade "pound dies) to bump .348 jacketed bullets up to .352". The other one had a good barrel so the owner used lyman 358318 bullet sized to .355"(smallest sizing die I had).I use .364" cast bullets in my .358"barrel with good results.Each of these rifles is a "law of it's own". If you could go to the "Mall Mart" and buy ammo, it wouldn't be nearly as much fun.
Mike
