I looked through the ATF's 9 page document on Pennsylvania's shotgun rules and only came away with three things:
1) a shotgun must be no less than 26" overall.
2) the shotgun barrel must not be less than 18".
3) you can only have 3 rounds in a shotgun to use for hunting this includes the...
Did some sneaking around field edges for a few hours on a local gamelands. Squirrels are far between but plentiful where you can find them. The two larger squirrels were a quick double that walked out on the same limb. All head/neck shots. Looking to try some squirrel cakes I have seen people make.