I went to the range today taking mostly 22's. My ammo for the day was Federal Auto Match in the 325 round box and Armscor 36 grain hollow point. In of my 10/22 Federal ammo had 10+ failure to fire out of 110 rounds. Most the rounds fired when loaded in my Ruger MKII. Loaded 50 rounds of the Armscor in 10/22 and had 1 failure to fire. Loaded another 50 rounds in my MKII with out a problem. I found the Artmscor to be hotter and I am not sure if it is more accurate. But it did hit the paper in the general area I was pointing but so did the federal. I guess I am trying to say I like the Armscor 22 ammo and glad I picked up 4 bricks on a whim. I think it is going to be great for plinking when I head out to the desert.