good work
the 46 Ballard my be an impressive round in a handgun also with blackpowder but in your rifle it looks like a boy gun.
I think you use the .22 long tool blank for priming. common was allways the short 6 mm Flobert blank but you may have problems to find it in alaska. I was allways worried about such a long case it will open up on the muzzle and will be hard to get out of his primer hole after firing. otherwise the blank stands into the powder and the pressure when fired will be inside and out very quickly so this prevent an "explode" muzzle.