Things to know about shooting this gun include its ammo requirement. When set up in Open configuration with the compensator, the Parrot requires ammunition with a major power factor. The minimum major power factor for USPSA is 165, and IPSC is 160. Power factor is calculated by the bullet weight (in grains) multiplied by the muzzle velocity (in fps) and divided by 1,000.
Typically, major power factor ammunition is reloaded, but it can be found from specialty ammunition manufacturers. For common ammo types, major power factor is similar to +P or +P+ ratings. In its Limited configuration, the Parrot still wants very hot ammo. We cycled 70-, 124-, and 147-grain ammo during testing, and it wasn’t quite happy with those rounds. I’d recommend trying 115 grains and maybe even changing springs if attempting to shoot factory ammunition.