I don't know of any place that is cheaper. I have lived here many, many years and there's really only one full-time reloading business (mostly rifle and handgun) and everything there is far more expensive than the Dollar. For example, shot is $50 per bag.
Several other places sell a limited amount of reloading stuff, but mostly rifle and handgun. Powder is always, IME, cheaper at the Dollar. Skyway has some powder, wads, shot, but, last time I priced them, they were higher than the Dollar, too.
There's a fellow who bring stuff in from "up north" but you have to order from him and he only comes once every two or three months.
A guy named Ken Meyers has a component business and brings product to Jacksonville, Winter haven, Orlando. He is very reasonable and is about to make a trip I think.
His number is 616-457-1685 email is [email protected]