Update
Well I bought the rifle, it is very nice to shoulder and whatnot. I have ordered up the components and a mould, but they won't be here until later in the week. I guess I'll learn first hand about the effects of the crescent. I hope it isn't too bad. I am anticipating recoil approximating 12 gage slugs, though without the benefit of a rubber pad.
I figured I'd start with Goex 2f and a simple card wad, and wiping between shots. I bought the standard "military" 500 grain mould from Lyman to start with.
I also purchased a pound of AA5744, but am reluctant to shoot smokeless in a rifle of this age, so that experiment may have to wait for awhile.
I'll let you fellas know more when I know more.