1-48 twist is your do all twist. Some claim it shoots roundball but not well. That of course is not true. I shoot roundball out of my 1-48 twist with amazing accuracy. The 1-48 will shoot conicals like the Great Plains, REAL, Maxiball, Maxihunter, Powerbelts, Sabertooth and others. The question here is, which one if any will it shoot well. Some 1-48 shoot maxiball real well but not maxihunters. Some shoot powerbelts, like my Lyman but not Great Plains. It is all a matter of trial and error. Also some of the 1-48 will shoot sabots. Then again some will not. You might have to experiment with a lot of different sabots, bullet weights, etc but there probably is one out there it will shoot well.

Just because your rifle is a flinter means nothing. The barrel twist will determine what it will and will not shoot. I can not write here and say POSITIVITLY the rifle twist will shoot sabots and conicals. It does in some BUT NOT ALL CASES. All you can do it try the different things in the rifle and let the rifle determine what it shoots.