One of my "Go To" guns that I use is a T.C New Englander in .54 with the 1/48 twist.
I've always shot 70 grains of 3F Goex and over a .530 ball wrapped in No.40 drill cloth (JoAnns). Shoots a nice round 3 shot 1 inch group at 50 yards from a rest and I can hit the 6x8 inch gong at 100 off hand. When I miss its me not the gun or load............Muzzle Velocity is in the 1400 range if I remember correctly. I believe you need to use a "NON Greasy" patch with 1/48 and shallow rifling for best results...................Bob
I've always shot 70 grains of 3F Goex and over a .530 ball wrapped in No.40 drill cloth (JoAnns). Shoots a nice round 3 shot 1 inch group at 50 yards from a rest and I can hit the 6x8 inch gong at 100 off hand. When I miss its me not the gun or load............Muzzle Velocity is in the 1400 range if I remember correctly. I believe you need to use a "NON Greasy" patch with 1/48 and shallow rifling for best results...................Bob