Hello, I am new to this forum and rather firearms as far as knowledge goes. I was gifted a Mosin Nagant 91/30 to replace an M44 I had lost, but that's a long story. So yesterday I went shooting, and things were alright. I made sure the bolt was firmly pressed in the receiver when the rounds chambered, but it wasn't difficult to secure the bolt (tips I heard were red flags for head spacing issues, but if I'm wrong I do need correction, I'm here to learn). Anyway, it fired great, I started out 1 round at a time, but then I filled the internal magazine and tried to fire all 4 of them. Each time I lift the bolt to eject round 3 of 4, the bolt handle gets REALLY sticky, to the point that slamming my open palm upwards to lift bolt didn't even release it. I noticed that as the receiver heats up, the bolt would stick, and I would have to give it about 10 seconds (and by touch, a noticeably cooler bolt) before I was able to lift handle to eject the spent rounds. Back when I had my M44, the bolt would always try to stick a little just before handle was fully lifted, as does this new 91/30, but the M44 never froze in that position, or got affected by heat regarding performance for that matter. When I picked out the 91/30 in the store (was gifted to me via friend's VISA) I selected one that had a perfectly smooth action, because I remembered my M44 sticking. However, the store had 2 91/30's and the clerk accidentally wrote the serial number for the wrong one, so when I finished my punishment period for living in California (10-day wait) I relieved that I had bought a rifle I chose against. I wasn't upset, hell the rifle was free and I was comfortable with it's set-up and shouldering and everything, and sale was final anyway, but that bolt turned out to be more of an issue than I thought. I hope I didn't post a long post for a well-known and easy-to-fix issue, but I didn't have anywhere to turn for this problem and Google can't win all my battles. For the infos I was firing crap-ish ammo, HotShot 180 gr leadcore brass jacket (is that description sufficient?). Never had a problem with their ammo, it's just "cheap." I only owned 21 round at the time, so I only fired 16 of them, but by round 15 I could barely cycle the weapon and decided to put it away before it blew my face off or something. My friend suggests that I research over-pressurization in the chamber from the wrong ammo. Anyone have ideas? Your time is appreciated, especially since I am long-winded when i type.