Im fairly new to hunting and have only gotten one deer with a centerfire rifle (in 2021) and I'd like to take advantage of PA's muzzleloading season and flintlock season after Christmas but really don't know where to start. I've been researching and looking and could use some pointers, or a mentor.

What is a good rifle to get as a beginner in muzzleloading? What powder to get? Where's the place to get supplies in SC PA?