For 2018, the Minnesota Big Game regs now read:
"Muzzleloaders (long gun or handgun) cannot be loaded at the breech (black
powder revolvers are not legal for taking big game if they are loaded through
the cylinder);"
"Smooth-bore muzzleloader used must be at least .45 caliber• Rifled muzzleloaders are at least .40 caliber"
Could be better phrased, but I feel this can be interpreted that my Ruger Old Army revolver is now legal for deer in Minnesota as long as I don't use a cartridge conversion cylinder.
Comments?
I would not think your Ruger Old Army revolver would be legal because you load it through the cylinder. Go to your Fish and Game office and ask them, get the right answer from the people that "should" know.