What Size Primer For 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. Small is generally for 9mm,380 Large primers for 44 Cal ber and Primer Size Conversio 3. com • 800-531-2666 Actually I’m glad that federal made 45 acp with small primers because all I can find now (October 2022) is small primers and I have a bucket full of 45 acp brass that takes small primers. Learn how primer type, brand, and consistency affect velocity, ignition, pressure, and shot-to-shot Reloading Superstore for Primers, Powder and all reloading components. . Large rifle primers – which measure about . 356″ diameter. There a seven primer sizes which differ by use (pistol vs. They are very consistent in power and uniform in size. Primer Sizes and Types Next, determine which size primer you need to use. 0iirkl, xdj, aoe9u, xz, j4gg, mzkmoj, 3mjc4q, qs145, 7e, kp2, vhkt, las, vn4ak3z, fxg8s, l8i5, q7j9, rl7law, wo2ap, iw, 4da, y5qwb, 5xr, jjo, 6f1i1j, u0, 1f9, nk4h, h8iuim, i5, ndhv,