Dave, I've been trying some of their (CircleFly at TOTW) 1/8" nitro card wads of the same .510 diameter. They seem to work great! Bigger and cheaper - go figure.

T7, a Super91 in .451 is going to be a bit of a rarity now. http://www.gunsamerica.com/guns/976711870.htm Doc White likely has no idea who you are or whatcomments you might have made.

bdeather, the Ultra Mags should come in a plastic hard case. Aside from the rifle itself, there should be 3 breechplugs (209 installed, musket & 11 packaged), two bolts (primer bolt installed, cap bolt in a green webbed sleeve), primer extraction tool, breechplug tool, 20 bullets, and owner's manual. If you have a choice of several, make sure the one you pick has all these items and also check the front sight insert is intact and secure.