Originally Posted by
Outpost75
I can't speak for the Japchesters or Italian guns, but both my Marlin 1894S carbines in .44 Magnum and .44-40 have slow twist barrels of .431" groove diameter, which shoot poorly with factory jacketed .44-40 softpoints having .425" bullet diameter. My Interarms Rossi .44-40 was likewise, but .433" and keyholed with factory loads, which is why I got it so cheap! All shoot well with 6 grains of Bullseye and Accurate 43-230G cast 1 to 40 tin-lead sized .431".
My 1920s Spanish El Tigre is slow twist with groove diameter .430" at breech, diminishing to .425" at muzzle and is the only .44-40 I own which will stay in a Campbell's soup can at 100 yards, versus a bucket for the others firing factory softpoints.