Daryl..........As you can see a .45 PRB would have to weigh 170gr. So, if you want to use a .45 for deer here you have to use a conical. If you want to hunt for elk you can't use a .45 at all. I don't agree with these laws, but they are what they are.
3. MUZZLELOADING RIFLES
& SMOOTHBORE MUSKETS
a. Only legal muzzleloaders allowed in muzzleloading seasons.
b. In-line muzzleloaders are legal.
c. Must be a single barrel that fires a single round ball or conical projectile.
d. To hunt deer, pronghorn or bear, they must be a minimum of .40
caliber.
e. To hunt elk or moose, they must be a minimum of .50 caliber.
f. From .40 caliber to .50 caliber, bullets must weigh a minimum of 170
grains.
g. If greater than .50 caliber, bullets must weigh a minimum of 210
grains.
h. Shotshell primers and B.O.R. Lock MZ System bullets are legal.
i. Pelletized powder systems are prohibited during muzzleloading
seasons.
j. Cannot be loaded from the breech during muzzleloading seasons.
k. Only open or iron sights allowed in muzzleloading seasons. Fiber optics
and fluorescent paint incorporated into or on open or iron sights
are legal. Scopes or any sighting device using artificial light, batteries
and electronic gear are prohibited during muzzleloading seasons.
l. Sabots are prohibited during muzzleloading seasons. Cloth patches
are not sabots.
m. Smokeless powder is prohibited in muzzleloading seasons. Black
powder and black-powder substitutes are legal.
n. Electronic or battery-powered devices cannot be incorporated into
or attached to muzzleloader during muzzleloading seasons