223 Remington History and General Information.  The 223 Remington was introduced to the public as a commercial cartridge by Remington in January 1964, one month later in February 1964 this same cartridge was officially standardized by the U.S. military as the 5.56mm ball cartridge M193.  The 223 Remington is one of the top varmint and predator rounds in the United States. With so many variations of rifle action types, surplus ammo, range brass, bulk bullets it's fair to say the 223 remington will remain at the top of the sales charts for a long time.  There is one point I would like to stress here, is, the fact military ball ammo is loaded to different pressure levels to work in military rifles with different chamber and throat dimensions than the commercial 223 remington versions. Ball Ammo can cause higher pressures in commercial sporting rifles.  The 223 remington is a light recoiling cartridge, easy to reload and fun to shoot, just remember to use only commercial 223 remington ammunition not 5.56 ball ammo, if using ball ammo make sure your firearm has been altered to military specifications.   223 Remington Barrel Specifications. Common Barrel Twist Rate - 1/7 - 1/16 Bore Groove Diameter - .224"   223 Remington Reloading Specifications. Bullet Diameter - .224" Maximum Case Length - 1.760" Trimmed Case Length - 1.750" Primer Size - Small Rifle   223 Remington Loading Data Hints.  The 223 remington can achieve good velocity when using commercial 223 remington cartridge cases if you are using military surplus brass check case capacity, for military brass is different than commercial 223 remington brass.   223 Remington Reloading Data. Hodgdon Reloading Data Center.   223 Remington Rifles. New Browning, Remington & Winchester, 223 Remington rifles here.  Sponsor - Impact Guns.   223 Remington Trajectory and Hunting Applications.  This is a down range trajectory chart for the 223 Remington cartridge with the scope mounted 1.5 inches above the bore center line plus if you were using this load, its effective hunting bullet energy range with well placed shots on, Varmint / Predator size game, such as Bobcat, Cougar, Coyote. Deer size game, such as Antelope, Blacktail, Hogs, Javelina, Mule, Whitetail. Elk size game, such as Caribou, Black Bear, Sheep. Moose size game, such as Brown Bear. Bullet diameter .224" Bullet weight 50 grains Bullet ballistic coeffecient .231 Bullet velocity 3,300 feet per second. Range 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. + + 1.4 0 - 7.2 - 22.3 - 48.7 909 674 489 347 243  Varmint + + + - - -  Deer - - - - - -  Elk - - - - - -  Moose - - - - - - Copyright 2001 - 2010