The post above should with all the links for Marlin fixes should be a sticky!
I had the same problem with my 1894C. The boolit would catch on the sharp edge on the right that was put there for the extractor to catch the cartridge rim. I tried several things which didn't work. I finally sent the rifle to Grizzly guns in Montana. Lew fixed it and did a few other things. He replaced the magazine tube and spring. Price was reasonable and the rifle now feeds SWC ammo that it did not before. I'm tickled.
Jim
ive had jam with Winchester 94 BB 375 when I first started running cast bullets through it--OAL needs to be exact it turns out. but never a problem with the marlin 375.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |