They should feed just fine in most Marlins, as I have used SWCs in my Marlins for a long time.
But accuracy may not be the best and here is why.
(Not that I am trying to dissuade someone from purchasing, but I always like to make sure someone actually gets what they need.)
The bullet used in the ammo above is a .44 240 gr. SWC Bevel Base (sized .430)
.44 rifle and pistol barrels are actually two different sizes.
SAAMI PISTOL barrel are .429
SAAMI RIFLE barrels are .431
The short version is that normally when loading for leverguns, you use a hardcast bullet specifically sized for the barrel if you want a precise load.
If you want to pop cans at 25 yards, then it really does not matter either way.
Hope that helps.
