RE: Pennsylvania and Shockwave Bullets
This is from the PA Game Commission web site regarding the Flintlock deer season ...
Flintlock Season - Flintlock ignition, single-barrel long guns
manufactured prior to 1800, or a similar reproduction of an original
muzzleloading single-barrel long gun 44 caliber or larger, or 50 caliber
or larger handgun, using a single projectile. It is unlawful to use
telescopic sights.
You can use Shockwaves. I use round ball for this hunt.