Check VA game regulations re> what is considered a loaded firearm for purposes of transportation or hunting.
In PA, game regulations require that you must remove cap/powder from flash pan, and recommend you should discharge the weapon for complete safety.
I don't trust a charge of black powder not to go off (especially considering the static shocks my seat covers have given me). Wasting a few balls into the ground in the name of safety is worth it. One of those CO2 gagets that blows the ball out is real high on my shopping list. I was wishing I had one the other day at the range.