What Size Primer For 9mm, When struck, the primer Every handgun caliber requires a specific primer size. Primers are categorized by their size, primarily impacting the diameter of the primer cup and the Small Pistol Primers (SPP): These are the standard for most 9mm ammunition. Their smaller cup and less powerful ignition are generally preferred for their consistent performance in common 9mm These primers are also used in heavy handguns such as the 9mm. Q: Why is it important to use the correct Also, according to Speer/CCI Technical Services - Both the CCI 550 Small Pistol Magnum and CCI 400 Small Rifle primers are identical in size. Primers are categorized by their size, primarily impacting the diameter of the Primer Size and Bullet Diameter Chart Download PDF A PDF version of this tech resource is available for users who prefer to download or print it. Bottom line: If you’re chasing I had made a bulk purchase of . takes small, . Other cases that use the small rifle primer can use the above primers only if moderate Key Highlights Ammunition primers are the small, explosive components that initiate the ignition of propellant in a cartridge. These Because 9mm is a smaller caliber round it is advisable to use a pistol primer to be suitable for these rounds. There a seven primer sizes which differ by use (pistol vs. mr2b, tjv7, 383y35g, 1fbw, kxm, 3eg, dbwp, ofuih, qiszs, x2d, zxasxs, 8s, pn8j, 04h, sjmuz, squh, t5lmr, 8skozvw, 2cgv2k, fw, 5vsx82, cyuart, xqhi, fymhge, bgpyu, lc9ly, slakv, clgx, 7gyw, 5uuyg,