My 1933 M91/30 Tula HEX receiver, it likes cast bullets coated, checked and sized to .314". Shoots several differ cast bullets with excellent results, including any of the Lee .312" bullets, it's favorite by far is the Accurate 31-215B which was designed by Tommy Boy, I had mine modified to cast a little larger. All bullets are cast from, 50/50 PB/COWW and quenched after coating and allow to sit about two weeks before loading.
5 shots at 50 yds.