Missouri is much more clear on such things...
http://mdc.mo.gov/hunting-trapping/regulations/deer-regulations/2011-firearms-deer-hunting
(With some of my emphasis added)
"Methods allowed
Methods allowed during all portions of the firearms deer season, except the muzzleloader portion.
Centerfire pistol, revolver or rifle using expanding-type bullets.
Legal ammunition includes lead bullets, copper bullets and bullets made of other material designed to expand.
Shotgun (including .410) with slugs only
Air-powered gun, .40 caliber or larger, charged only from an external high compression power source (external hand pump, air tank, or air compressor)
A muzzleloading or cap-and-ball firearm .40 caliber or larger and capable of firing only a single projectile at one discharge; in-lines and scopes are allowed
Multiple-barreled muzzleloading or cap-and-ball firearms and/or muzzleloading or cap-and-ball handguns, including revolvers, .40 caliber or larger are allowed and may be carried in addition to a muzzleloading or cap-and-ball rifle
A longbow, compound bow or recurve bow of any draw weight; hand-held string releasing devices, illuminated sights, scopes and quick point sights are allowed
Crossbow
Atlatl, which is defined as a rod or narrow board-like device used to launch, through a throwing motion of the arm, a dart 5 to 8 feet in length.
Methods prohibited (in use or in possession)
Self-loading firearms with capacity of more than 11 cartridges in magazine and chamber combined
Ammunition propelling more than one projectile at a single discharge (such as buckshot)
Full hard metal case projectiles
Fully automatic firearms
Any sighting device that casts a beam of light on the game
Electronic calls or electronically activated calls"
And
"Muzzleloader portion
This portion of the firearms season allows hunters additional time to hunt using muzzleloaders.
Season dates
Dec. 17–27 statewide
Methods
a muzzleloading or cap-and-ball firearm .40 caliber or larger and capable of firing only a single projectile at one discharge; in-lines and scopes are allowed
multiple-barreled muzzleloading or cap-and-ball firearms and/or muzzleloading or cap-and-ball handguns, including revolvers, .40 caliber or larger are allowed and may be carried in addition to a muzzleloading or cap-and-ball rifle"