WOW!! that is some pretty impressive shooting for first time out. I really like the Warne Rings.. I am not sure what the wobble is in them though, that you speak of. Mine normallyset up solid as a rock. On the twist levers there is a little play but nothing to concern yourself with. Check that screw in the front. Is it sticking out way past the rings when tight?

That load you're shooting has some gas to it. There should be nothing you could not hunt with that load you're shooting. And with that kind of accuracy for first time out, that says a lot for the rifle, the scope and your ability.. Nice shooting.