One of the Good Guys on another thread asked me to compare the down-range performance of his .243 Winchester load and a typical .220 Howell load. (That other thread was on another subject, somewhat less interesting.)<P>It occurred to me that some of my other good buddies here may be interested in the same data, so here they are.<P>bullets � .220 Howell, 75-grain A-Max � .243 Winchester, 70-grain Sierra<BR>barrel lengths 26 in.<BR>zero (both rifles) � 295 yd<BR>BC � .224 A-Max, 0.440 � .243 Sierra 0.259<P>velocity at muzzle � .220 Howell, 3,600 ft/sec � .243 Winchester, 3,620 ft/sec<BR>velocity at 100 yd � .220 Howell, 3,350 ft/sec � .243 Winchester, 3,205 ft/sec<BR>velocity at 200 yd � .220 Howell, 3,120 ft/sec � .243 Winchester, 2,830 ft/sec<BR>velocity at 300 yd � .220 Howell, 2,900 ft/sec � .243 Winchester, 2,480 ft/sec<BR>velocity at 400 yd � .220 Howell, 2,690 ft/sec � .243 Winchester, 2,160 ft/sec<BR>velocity at 500 yd � .220 Howell, 2,485 ft/sec � .243 Winchester, 1,860 ft/sec<P>bullet path at 100 yd � .220 Howell, 2.1 in. � .243 Winchester, 2.5 in.<BR>bullet path at 200 yd � .220 Howell, 2.7 in.� .243 Winchester, 3.3 in.<BR>bullet path at 300 yd � .220 Howell, - 0.25 in. � .243 Winchester, - 0.3 in.<BR>bullet path at 400 yd � .220 Howell, - 7.3 in. � .243 Winchester, - 9.6 in.<BR>bullet path at 500 yd � .220 Howell, - 19.2 in. � .243 Winchester, - 25.4 in.<P>wind deflection at 100 yd � .220 Howell, 0.55 in. � .243 Winchester, 0.9 in. (10-mi/hr wind)<BR>wind deflection at 200 yd � .220 Howell, 2.2 in. � .243 Winchester, 4 in.<BR>wind deflection at 300 yd � .220 Howell, 5.1 in. � .243 Winchester, 9 in.<BR>wind deflection at 400 yd � .220 Howell, 9.4 in. � .243 Winchester, 17.5 in.<BR>wind deflection at 500 yd � .220 Howell, 15.2 in. � .243 Winchester, 29 in.<P>Unless I've typed-in a typo, these figures should be a heck of a lot more accurate than either of us can tell by shooting these rifles.
