As for projectiles, I would get some 240 grain T/C Mag Express XTP's w/sabots & 250 grain T/C Shockwaves w/sabots. These two should shoot good out of your rifle. Also a box of Maxiball for each rifle would not hurt. Shoot the maxiball with 80 grains of powder. Shoot off the whole box. This will help break the barrel in for you. You will need bore butter if you buy the maxiball in bulk. If you buy them from Thompson Center they come pre lubed.

Be sure and swab between shots. Also start your sabots out at about 80 grains of loose powder and shoot a three shot group. If it is tight, kick the charge up to 90 grains and shoot another group. If that's still good, then try 100 grains. Somewhere in there you are going to get a real tight group. Stick with that.

I like the old Winchester Primers. I also like the new Remington Kleenbore Primers. I do not like what Winchester did by putting standard old shotgun primers in a fancy carton and selling them as "muzzleloader primers." They are not less powerful then any of the other ones. The Winchester I like are the W209.

I'm not sure how crud rings will be in your rifle. If you get triple Se7en powder keep an eye on that and be sure to use a witness mark until you are more comfortable with shooting the rifle..