I got three of these the last Friday, and took them to the range on Saturday. They are great little targets, but I don't know what I'll be able to shoot them with. I'm sure that they'll hold up fine to rimfires and pistol's. I tried two rifles on them, a 6x47 and .338 WM, with a MV of 2980 and 2750 respectively. At 100 yards the 70 grain NBT bored right through and the 250 grain Sierra concaved the circle and twisted the arm. I'd love to have these in 3/8" or 1/2" which would be a lot heavier but still reactive enough for what I like to shoot. I wouldn't hesitate to try some of the other targets offered.
I thought these are AR400 steel and intended for .22? I received mine last week but haven't given them a try.