I've gathered from reading numerous threads on this site that Mosin bores can be up to .314", so I slugged my sniper to see if it's accuracy might be improved by going to a larger bullet than the .309" lead I've been using. It measures right at .312", so I loaded up a couple each of .312", .313", and .314". All three bulged the case neck, BTW. Before shooting 'em, I tried chamber fitting. No luck, none of them wold allow the bolt to close, although the .312" almost fit, that is I could force the bolt to close if I really pushed it. Ain't about to shoot that one, though- pressures have got o be way high!
So - does anyone have any words of wisdom for me here? .309" is probably too small, being .003" under bore diameter, and the theoretical ideal of .312-.314" won't even chamber. Velocities are modest, I'm using 14 to 16 gns. of unique, so may not be getting full obturation. Beyond trying .310 and .311", which I will do after I order some bullets, has anybody else tried lead bullet loads with success? Or figured out a way around the tight chambering?
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.