How to choose reloading primers
Choose primers by looking up your cartridge in published load data. The recipe names the primer size and type, and sometimes the brand, that it was tested with.
Match the primer size
Primer size is set by the case's primer pocket. Small and large primers are different diameters, and each case is made for one or the other. Check your brass or manual before you buy.
Choose rifle or pistol
Rifle primers have a thicker cup than pistol primers because rifle pressures run higher. Do not swap rifle and pistol primers unless your load data says it is acceptable.
Standard, magnum, or match
- Standard primers suit most loads.
- Magnum primers are used with large cases and slow powders when the data calls for them.
- Match primers are made to tighter tolerances for competition shooting.
Common uses
Pistol shooters usually need small or large pistol primers, such as CCI 500 small pistol primers. Rifle shooters choose small or large rifle sizes, such as Federal large rifle primers. Shotshell reloaders use 209 primers, and 50 BMG shooters use 50 BMG primers.
Seat them correctly
Primers should seat slightly below the case head, never proud of it. Check each case after priming, and handle primers with clean, dry hands to avoid contaminating the compound.
