I once had a Marlin '95. in .44 mag. I did not know of the over sized bore problem at the time. Mine was doing well if it shot a 4in. group at 25yds. from a bench. I don't remember it shooting better/worse with cast/jacketed bullets.
I sure liked the way that little carbine handled. But, guns that don't shoot accurately don't stay here long.
His little brother in .357 mag. would consistently shoot 1.5 or less at 100yds. with an aperture rear and factory front sights. It moved on to make room for groceries. I sure would like to have that one back.