Why do reloaders buy brass? What am I missing? The only reason I can think of is if you want new brass for a special high accuracy load that you think used brass might not get as accurate a round from. Is this right? Other than that why wouldn't one just reuse the brass from the rounds you shoot? Even if just starting out as a reloader it would make sense to buy factory cartridges and reuse the brass from them. Having to buy brass really skews the economics of reloading.