There`s a BassPro shop availability is limited on primers ,but a good selection on IMR & Hodgdon powders.
Then Myrtle Beach indoor shooting range , Very nice place to shoot but prices are premium to say the least but have it in stock most of the time .
There`s a couple in Wilmington NC (1 hr drive 1 way) that cater to the tactikool bunch , been to shooters choice 1 time & left without buying anything.
I`m sure there`s some smaller shops maybe in the Conway or Pawleys Island area that`s slippin my mind at the moment.
The place in Summerville is ATP Gunshop & Range 1-843-873-2250
Been there many times , ( buddy lives in Cottageville) prices are OK ,but is an impressive set up IMHO.
Have fun & enjoy the Low Country !!!
Shooters choice is out of the reloading business. Guns only.
All the Best,