RCBS 15503 Small Base 2-Die Set 308 Win - Group A

The RCBS 15503 Small Base 2-Die Set is built for bottleneck rifle cartridges that demand case dimensions close to SAAMI minimums. Sized for 308 Win, this two-die set delivers the tight body sizing reloaders need for reliable feeding and chambering in semi-automatic, pump, and lever-action rifles, where standard full-length sizing can leave cases just large enough to cause occasional chambering issues.

This Group A set pairs a Small Base Sizer Die with an integrated expander-decapping unit alongside a standard Seater Die with seater plug. Each die is machined from polished, heat-treated steel and threaded to the standard 7/8x14 pattern for drop-in compatibility with virtually any RCBS reloading press.

Small base sizing brings fired .308 Winchester brass back to a more uniform, smaller diameter than a standard full-length die, helping cases drop into tight chambers without the occasional hang-up. The expander-decapping unit handles case preparation in a single station, while the seater plug lets you dial in precise bullet seating depth for the 308 Win load you are working up.