I tend to think simpler is better for hanging gongs. 3/8 and 1/2 with holes at the corners, with 3/4" of material between the edge of the hole and the edge of the plate. I would prefer squares or rectangles to circles.
375 Ruger is the NEW KING of the .375's. ALL HAIL THE NEW KING!
What, No love for something smaller like a 4" gong? I'd buy one or two for sure! Can't get out past 100m in a lot of the places I shoot, and a 8" gong at 75m isn't particularly challenging with an SKS, let alone a scoped bolt action...
"We don't take souls, we leave that to wives and girlfriends, but we can do a layaway " - Grumpy Wolverine.
If you need religion to have good morals then you don't actually have good morals.
Yep I would only buy 1/2 " plate, because 3/8" is clearly insufficient with .30-06 and I want it to last more than a few shots.
I would be all over a dueling tree.