Any unit.

Here is #3 in the Muzzleloader rules.

3. In addition to the above requirements, it is
unlawful to participate (hunt) in a muzzleloading
hunting season using a firearm that does
not meet the following specifications for a
muzzleloader. As in the past sabots are allowed.
Any type of projectile is allowed.

They changed that 2 or 3 years ago I think.
_________________________
WDFW - Turning outdoorsmen into golfers since 1994.