Well I got to the Range this morning to test the Fed. Auto Match. Since I last shot, using Fed. #745 (36g / 1260fps) ammo in my 10/22, I didn't clean the barrel, I just shot 30 rounds from 25, 35, 45, & 50 yards (standing) using the Auto Match to try and acclimate the barrel to the Auto Match. I was surprised (not a whole lot) that it marked on the gongs pretty much with the same holds I used with the Fed #745, even with a difference in listed "fps" (Fed. #745 - 1260fps -vs- Fed. Auto Match 1200fps).
I next went to paper and found that the Auto Match from 25 yards (off the bench) really didn't group as well as the Fed. #745, but it wasn't that far off. I shot four / 5 round groups.
After the paper I went back to the gongs and ran three more 10 round magazines from various yardages. Again, it performed well, but not really enough to "not" continue to use the #745 when it's available.
I did get the talked about "under powered round" once from the Auto Match, but only once. Had no miss fires or ftf's. It functioned well in my 10/22.
I expect I'll next test it in my S&W 22A.
Thanks for the replies everyone!