In Pennsylvania, the only requirement for deer and black bear in regular firearms season is that it is a centerfire round with a projectile designed to expand (i.e. no FMJ). If so inclined, you could use a .17 Remington for black bear. Muzzle loading long guns must be a minimum of .44 and muzzle loading handguns must be at least .50.
There is limited hunting of the PA elk herd, and IIRC, there is a .270/130gr. minimum for them.
PA you can use .223 for deer? That’s unusual.
You can use them for deer in Texas.