I like it for range ammo
I have used the Remington UMC 223 numerous times in the past and find to by just fine for range ammo. Not very dirty, and generally pretty accurate for cheap range ammo.
I usually use PMC for my 223 range ammo though. I tend to buy from Natchez Shooting Supply, and they have it on sale quite often for $6.99-$7.29 per box (less than a case so no bulk discount, it gets cheaper if you buy more). It is more than accurate for what I use it for.
"The philosophy of gun control: Teenagers are roaring through town at 90MPH, where the speed limit is 25. Your solution is to lower the speed limit to 20."
- Sam Cohen (inventor of the neutron bomb)