When I bought my Marlin 375 new it was because they were not making a .38-55 at that time. The .375 has worked out fine and I don't have to worry about long brass. short brass or any of those things. When I bought the rifle i bought two hundred of the 220 grain jacketed bullets, a Lyman mould , a .377 bullet sizing die and a set of R.C.B.S. reloading dies. That along with plenty of new*brass plus a Williams site have kept me shooting all these years. Whatever you decide, be smart and stock up on supplies so you can keep shooting.I think that the .375 Marlin must have been made a little stronger because the Winchester 94 Big Bore was made with added metal at the back of the receiver.