Montana Precision Swaging makes a 265g RNFP in a BP alloy that works really great in my 1899 vintage Marlin 1893. These are sized at .381, and being a soft alloy will bump up some............Buck
Montana Precision Swaging, Inc.
P.O. Box 4746
Butte, Montana 59702-4746
Phone: (406) 494-0600