CCI now offers a rimfire load designed specifically for AR-15 .22LR conversions. The new load is called .22 Long Rifle AR Tactical and CCI claims that it is purpose built for reliable function and increased accuracy in .22LR conversions.
It uses a 40 grain copper washed lead round nose bullet. CCI states that the lead round nose bullet was chosen for its feeding reliability from among several bullets that they tested. The copper wash should help keep leading in check for those who don’t run a dedicated conversion. The muzzle velocity is 1200 feet per second which CCI claims helps with accuracy in AR-15 .22LR conversions.
The reports on this ammo are mixed. Some say it is a gimmick while others have reported excellent reliability and accuracy. The copper wash and lead round nose bullet make sense to me, but the 1200 FPS velocity concerns me since some conversions have fairly stiff recoil springs. The only way to know whether it works for you is to try it in your specific firearm. It may be just what you need to squeak out every last bit of functionality from your .22LR conversion. It is nice to see an ammo manufacturer making the effort to support this valuable training tool.
You can find a more detailed PDF spec sheet for the .22 Long Rifle AR Tactical on the CCI website.
If you are interested in other ways to increase the reliability of your .22LR conversion, check out the previously reviewed .22 Thruster from Carlson Comps.