The RCBS Automatic Primer Feed Combo is just the tool you need to speed up your reloading process. In addition to making your reloading process faster than ever, the RCBS Automatic Primer Feed Combo also curbs misfires and helps to prevent contamination of primer due to oil on your fingers. The RCBS Automatic Primer Feed Combo works by dropping your primers into the plug and sleeve one at a time. The nylon primer pickup prevents your primers from falling out. The RCBS Automatic Primer Feed Combo has a 100-primer capacity, and it comes with a small and large primer tube.