It'll go away. Give it a week or two more, without any additional trauma of course. I once shot my Mosin-Nagant M44 with out plugs once. 15 rounds is all my ears could take. Ringing for a week or so, then back to normal.
I love mine. I have it on a 45 offset on my AR.
The cheek weld for the scope is the same weld for the Delta point, just at a twist of the rifle. Works extremely well for bouncing between clearing rooms and the longer range/precision shots. I can't speak to the ruggedness of it, however, as...
When I first purchased mine, I was also highly disappointed. However, I was also using whatever ammo I could find. Turns out I just wasn't using the right stuff.
Try any match 168g, you'll likely see better results. I reload now for even better accuracy. I don't usually shoot groups at...