Here is a consolidate summary of all the pistol calibers that are currently recognized by SAAMI. The purpose of this is to provide a quick glance of cartridge specs for the curious mind. 5.7 x 28 FN MAP (PSI) – 48,500 Headspace – Shoulder .315 Headspace Dim – .935 to .945 Max Case Length – … Continue reading SAAMI Pistol Cartridge Catalog