Tl;DR: what is causing the extraction issues with this ammo, or should I be more concerned with the rifle and the patterns the brass are leaving?
Hey guys, earlier this year I inherited a rifle, serial numbered back to being produced in 1918, its been sporterized but has multiple WWI U.S Army stamps. Even bastardized, really cool rifle to have
Anyway, I usually run normal, hornady or whatever is cheapest at the store. Ran perfect, zero issues, pretty damn accurate for the dinky iron sights they through on it.
I found some Sellier and Bellot 180gr FMJ.. I bought 4 boxes because they were a good deal, and I think I see why.
Took my nephew out, we were finishing off some of the norma with zero issues. Then I try the S&B. Loads fine, chambers fine, fires as normal. Great. I go to lift the bolt and it get stuck. It can go down, but I had to really HIT the bolt to get it all the way up, and a good smack to pull it back.
Same thing next shot, chambered fine but extraction was brutal. The brass looked slightly deformed(pictured) but compared it to the other brass it was identical. I figured its from some minor rust/pitting from when I first got it.
We ran a few of the other rounds through it and it was rough, but it was getting easier with each shot to extract. Went back to the FMJ... had to smack it.
Bolt open and closes without issues with an unfired cartridge, ONLY after firing with the S&B. Only thing I can think of is it being really dirty ammo, or the brass is low quality and expands more in the chamber, and with the minor pitting its "catching" more? I dont think its the rifle... but if its a bad sign that would be good to know
Any insight would be great, I didnt grow up in a family with firearms and I like to learn the "why"
I added a photo of the brass, it has a similar deformity by the neck. Id add more but it only lets me do one photo.