In most Marlin rifles the extractor will extract the fired cartridge satisfactorly but in sometimes will not hold
the empty long enough to eject it.
Most of the Marlins will handle rimlesscartridges through the magazine without difficulty. A few rifle will require work on the cartridge stop.
My 308MX will handle two rimless cartridges in the magazine but a third will cause the cartridge to jump the stop and tie up the action.
My Winchester .307 will handle one rimless cartridge in the magazine with a second cartridge compressing the magazine spring enough to cause the cartridge to jump the stop and tie up the rifle.
I have formed307 Winchester and .308 Mar.in Express cases from .444 Marlin,. 30-06 and .270 Winchester cases. They all work fine with some requiring inside neck reaming.
https://www.shootersforum.com/threads/308-marlin-express-brass.39328/page-2#post-284872
