Got a 300 yd. bench rest shoot comeing up and have some questions on the range of these two rifles. The .222 Rem. effective range is listed as up to 250 yds. in the old reloading manuals that I have. Yet the ballistics listed for the two rounds are really close for the same weight bullets. For instance the .222 is 2734 with the 70 grn. bullet and the .223 is 2753 fps. BL-C(2) powder. I've read of people competeing with the .223 at some pretty extreme ranges. At least in my estimation. I must be missing something obvious here for there to be that much difference in the effective ranges of the two rounds.