I slugged my NEF Buffalo Classic barrel and it is a little larger at the muzzle but I am going to try it anyway, my plan is to shoot cast bullets with Benchmark or H332 with Fed 215M primers, as much as cast bullets cost I don't want to try every brand out there, I realize every barrel is different but is there a cast bullet company that has a proven long range bullet for the 45/70, by long range I mean no further than 700 yards.
