I found some Hornady "Custom" 7.62x54mmR at Cabelas in Montana. Brought a box back to try. Went out the range today with my M44. Fired about 20 rounds of Russian or Chinese surplus to sight in the irons (but that's a different story). Copper washed, no issues. Then I fired 3 rounds of Prvi Partizan 150gr. Brass case, no issues. Then I fired 3 rounds of Sellier & Bellot 180 gr. Brass case, no issues. Finally I popped in the Hornadys. 150gr, steel case, the bolt seized up. I fought with it for awhile, and then resorted to taking a hammer to it. I figured that maybe the chamber was getting too hot, so I let it cool for awhile. Fired a second round when everything was back to normal temperature, and the same thing happened. The empty shells will not allow the bolt to close on them. This is true for the M44, and two 91/30s I have. The two rounds I fired were really accurate; about 1" apart at 50m with irons. Is there something wrong with the old m44? If not, consider this a warning.
PPU, S&B, and the two Hornadys
The heads.
Hard to see, but the Rim is a bit deformed.
What I'm wondering here is whether I should complain to Hornady, or if my rifle has some issue.
PPU, S&B, and the two Hornadys

The heads.

Hard to see, but the Rim is a bit deformed.

What I'm wondering here is whether I should complain to Hornady, or if my rifle has some issue.