All CCI Primers Possess a larger anvil area to compensate for firearms that could have an off-centre firing pin and are engineered to help sleek feeding in automated reloading machines. The APS (Automatic Priming Method) primers are preloaded into colour-coded plastic strips for use in the proprietary RCBS APS primer https://sethwskga.oblogation.com/30971295/cci-250-for-dummies