They are a good bullet.
I had a funny experience with them last year when I went to a new indoor range to sight in my rifle. The rifle is a Remington 783, 223 1:9 twist, that was purchased for $250 after rebate.
The range has a policy that you have to sight in the rifle at 50 yards before you can move out to the 100 or 200 yard line, and a sub 2 inch group is required. I bore sighted the rifle, took two shots to get it zeroed, and then proceeded to put three shots in a little cloverleaf. The guy next to me said be careful, they may not be able to see the three shots for proof because they were so tight together. We had a good laugh.
While the BC is only slightly higher than a 55 FMJ, they shoot way better than expected at 500 yards. Good bullet for the money.