1895 45/70 extractor

Recently bought a new 1895sbl went out to shoot it the other day and when you go to rack a shell into the chamber it gets stuck (canted) it’s not a smooth rack I was just wondering if any of you had this problem??

I've broken 2 extractors on a new 1895 SBL 45/70 in less than 50 rounds. Marlin will send new ones, but what is causing it to break? Winchester factory loads with two rounds splitting the case (along the long axis of the case). Second time to the range, 30 rounds fine with no split cases...