RE: modern muzzel loading
JCC, is that rifle a front loader? This is from the Mississippi Hunting Manual.
PRIMITIVE WEAPONS
Primitive weapons for deer hunting are defined as longbows, recurves or compound bows, single or double-barreled muzzleloading rifles of at least .38 caliber, or single or double-barred muzzleloading shotguns loaded with a single ball or slug. All muzzleloading primitive firearms must use black powder or a black powder substitute with either percussion caps or flintlocks. A “black powder substitute†is defined as a substance designed, manufactured and intended to be used as a propellant in muzzleloading or other black powder firearms, excluding modern smokeless powder.