Howdy,
Since you didn't specify, I am assuming you are only talking factory barrels - which greatly limits your choices. You also didn't let on what the primary predator/varmint seeked will be. That in mind, of your two choices, by far the most versatile is the 223. Factory ammo can be had quite cheap and even most TC factory 223 barrels shoot with a lot of precision. Forget about any velocity loss - not enough to worry about. It would reliably take almost any P/V that you want to in PA. Since you are not reloading for it, the factory 223 wouldn't be very pelt friendly though. Depending on which bullet is used it can be very destructive on P/V sized game. Neither round is quiet, but the Hornet is considerably softer than the 223 if that's a major concern in your area. So I guess my opinion is that if pelts/noise are you biggest concerns, go the Hornet. Otherwise the 223 gets the nod as one of the best (non-wildcat) P/V rounds out there.
HTH, and welcome to the world of TC's.
Ladobe :bye: