PA still has the " Flintlock" only rule for its traditional after Christmas (Dec 26-Jan10)" Muzzleloader Season" ....however they have since removed the " Roundball only" regs........this season is Antlered(statewide)if you still have your " buck" tag and antlerless with appropriate tags for whatever DMU you are hunting.

Flintlock Muzzleloader Season: Only single-barrel long-guns with a flintlock ignition system are permitted. The firearm must be an original or reproduction of a gun used prior to 1800, which is .44 caliber or larger, with iron, open " V" or notched sights (fiber-optic inserts are permitted). A flintlock ignition system consists of a hammer containing a naturally-occurring stone which is spring-propelled onto an iron or steel frizzen, which, in turn, creates sparks to ignite a gunpowder. Flintlock hand guns are not permitted. Flintlock muzzleloader hunters may use " any single projectile," including sabots, and mini and maxi balls.

PA also now has an Early Antlerless Only Muzzleloader season where " Anything Goes" (Oct 18-25)This season requires possession of an appropraite Antlerless tag for the DMU you will be hunting

Antlerless Muzzleloader Season: Any long gun muzzleloading firearm, including in-line and percussion sporting arms. Use of scopes and other lawful sighting devices is permitted. Fiber optic inserts may be used.

Just thought I' d shed a little light on the speculation.....there are also a number of State Parks in PA that will allow only Muzzleloaders or Shotguns and in that case Any weapon and bullet choice also applies.......these can only be hunted at a time when it is legal to hunt deer with a firearm/muzzleloader in the rest of the state.