IMPORTANT NOTE REGARDING AMMUNITION FOR THE PSG 22
The PSG 22 is a short barreled blow back operated 22 LR pistol. It is chambered for and designed to properly function with the .22 caliber Long Rifle rimfire cartridge. We only recommend the use of high velocity or hyper-velocity ammunition, manufactured to U.S. industry standards, in the PSG 22 for optimal function.
Due to its blow-back operation, a fast cycle of the action is required to achieve proper ejection, extraction and hammer reset. When we say "fast cycle" we are talking about the amount of burnt powder a fired case ignites to cycle back the bolt carrier. The PSG 22 needs as much gas pressure as possible to eject, extract, reset the hammer, and feed a new round, much like other 22 LR pistol.
Low pressure, lower powered, or low quality ammunition is often inconsistent and anything below High velocity will struggle to cycle properly when not fired suppressed.
POF recommends a break-in of around 500 rounds of high velocity such as those listed on the recommended ammunition list.