well i had that problem yesterday in my .44 1894c and it pissed me off so much I wrote the BBB. I have had nothing but problems with my 1894c. I have probably spent over 400 in gun smithing, new carriers and new levers. Im pretty up set still, apparently I got one of the very first Remlins. Anyone reading this do not buy a Rem/Marlin.
Now, after it has been brought home and cleaned, I cleaned the magazine tube but did not lube it. It runs smooth, ugh. I just cycled 5 rounds of a heavy 300gr Sierra and it cycles fine in the house, these were dummies. What I think fixed the issues was: loose screws!
At least when one screw was cranked down the gun runs fine. For now, after 25 magnum rounds my stock becomes loose and i have to tighten it so now maybe I will just tighten the whole gun, every 25 rounds. I will contact Marlin and send it back, I have not mailed it back because there is a great gunsmith here and he really tuned it will. The jam that developed yesterday for me was new, a new symptom.
So my suggestion, clean it, go light on the oil, and tighten all of the screws on the receiver and see if that fixes it.
I want to sell the 1894c but I will have to cheap and disclose that this is a lemon, but then I will use that to buy the Winchester .44.
Sorry for the rant.