The same primers that Federal 155 primers uses in their high quality ammunition. Made to exacting standards for dependable ignition. Federal 155 Primers in stock now for sale are an excellent choice for reloaders of rifle and handgun cartridges since they are both inexpensive and dependable. Federal large pistols  primers’ distinct priming mix and reliable ignition make them ideal for high volume shooters as well as those who are just learning how to reload a firearm.