While the .223 Rem. handles bullets from 35 grains to 60 grains, even 79 grains in custom fast twist barrels, the standards are 50-, 52-, 53-, and 55-grains. A 1-12 twist barrel will stabilize the 55, but not always the 60s. Although the 50-grain can be driven faster (roughly 3,400 fps in most factory loads) than the 55s (about 3,240 fps average,) coyote hunters sometimes find it a bit light for bigger dogs. An extra 5 grains might not sound like much, but in .224 it makes an appreciable difference in retained energy and wind deflection (forms being similar.) So let’s check the trajectory of one of the higher B.C. 55-grain .224 boat-tails on the market, the Sierra BlitzKing at .271 B.C. Sierra’s handloading manual indicates we can push it to 3,300 fps from a 24” barrel. We’ll zero it and all cartridges for a 5-inch target zone, maximum ordinate no higher than 2.5 inches. That’s plenty of room for a safe center mass hold on even a small coyote. We’ll figure maximum point-blank range (MPBR) will be the distance at which our bullet falls 2.5 inches below point-of-aim.