Michael,

Your getting into a very technical area of cast bullet shooting and there are no easy answers. My first question to you would be what is the diameter of the groove and bore on your rifle? How did you make the false-muzzle? I ask this question because traditionally the false-muzzle is made before the barrel is rifled. The rifling is then cut in the false-muzzle at the same time as the barrel.

MP Sadly Deceased as of 2/17/2014