@maillemaker, PC stands for Period Correct. It can be used as a pejoratives term when describing a T/C "Hawken" or an Investarms rifle with coiled springs in the lock as these were not features of rifles produced before 1850. It can be used when describing a Ruger Old Army or an 1858 Remington replica revolver with target sights or a Tingle pistol. The modern target Minie' balls or Maxi-Balls are not PC.
Percussion lock firearms are not PC in the period prior to 1832.
My 1809 Derringer Rifle is not PC in the context of the April Trade Faire at Fort de Chartres which is striving to loosely represent the period in the Illinois Country from 1765 to 1780.
Now a lot of the PC/not PC debate can be overlooked because the item is in the tradition related to the period. After all, none of the rifles I am aware of use skelp forged barrels and most of lock components are cast, not forged. PC or not PC are terms we should be aware of but not used as a means of exclusivity. We should be accepting of items that are used in the tradition intent. Juried events are an exception