Yesterday, I took the AR-10/SN-3 combination (shown in the top photo) to the range and shot up the equivalent of one and a half boxes of ammo. I used my 168 Grain loads that use Rem 9 1/2 primer and 4985. Goal was to get it on the paper. My old collimator is in the trash. I will not mention the brand.
I shot both at 50 yards and 100 yards with a number of different people next to me. I asked as many of them as I could if the muzzle blast bothered them. To a man(women), no one seemed offended. Interestingly the guy with the blast had a muzzle break on a single shot pistol, which appeared to be something like a .243. It's blast almost took your head off.
I got to the range about 3:00. They operate on a 15 and 10 minute cycle. 15 minutes of shooting and then 10 minutes of cease fire so you can "go down range to check or change your target". I started at 50 yards to get on the paper, walked the rounds into the center and then moved to the 100 yard range. Well, by the time I had got everything centered at 100, the range had grown quiet, and I had my lit reticle turned on just for fun.
Well, anyway I turned around and there was about five people standing behind me. "What kind of scope is that?"
Well, it turns out that everyone else had stopped shooting about 20 minutes before because it was too dark for them to see their targets, but I had continued to shoot with the assistance of the 44/58mm USO objective and the lit reticle. In the process of everyone putting away their stuff the range master had turned the overhead lights on in the shooting area, and that was the reason I had stopped shooting.
That episode tickled me no end on the way home. By the way, to report my group sizes would seem like bragging, so I will desist. I was pleased.