It was a hoot. I fired about 80 rounds through it in the process of zeroing the sights. I set it up for a 50 yard zero, but then I shot it at 100. Since it only has the stock iron sights, it's hard to tell about group size at 100, but I was able to hold a 4-5" group. Does that seem about par for the course? (The Bushmaster is a LEO 16" with collapsible stock, bayonet lug, and threaded barrel.)
Also, I began to experience some failures to extract toward the end of the session. Is that fouling buildup after so few rounds or should I be looking for some other cause? The ammo was USA (Winchester) 5.56 ball.
And finally, where is that table that shows trajectory with a 50 yard zero. I saw it here, but can't find it again.