280 Remington History and General Information.  The 280 Remington is based on the more popular 30/06 cartridge case and very similar to a earlier wildcat cartridge 7mm/06. Remington began producing the .280 Remington in 1957, later changing the name of the cartridge to the 7mm Express Remington in 1979, and still later Remington reintroduced the cartridge in a model 700 rifle and renamed the cartridge to 280 Remington again.  The 280 Remington cartridge did not catch on in 1957 in the Remington rifle model 742. When the 280 Remington / 7mm Express cartridge was reintroduced in 1979 the one noticeable difference was the advertised velocity increased approximately 100 fps. and this according to Remington was do to the use of slower burning powders that had been developed since the original 280 Remington cartridge was introduced in 1957.  One of the other quirky extensions of the 280 Remington / 7mm Express cartridge is the Remington rifle model 725 as these rifles do have different rifling twist rates varying from 1 in 9 1/4" twist to 1 in 10" twist.  The 280 Remington / 7mm Express is a great cartridge and a great alternative to not using a magnum rifle with almost equal ballistics and a little less recoil.   280 Remington Barrel Specifications. Common Barrel Twist Rate - 1/12 - 1/9 Bore Groove Diameter - .284"   280 Remington Reloading Specifications. Bullet Diameter - .284" Maximum Case Length - 2.540" Trimmed Case Length - 2.530" Primer Size - Large Rifle   280 Remington Loading Data Hints.  The 280 Remington is a fine shooter with almost all bullet weights however if you have one of the earlier rifles check the rifling twist rate if it has a slow twist rate just stick to lower bullet weights for accuracy issues. 280 Remington Reloading Data. Hodgdon Reloading Data Center.   280 Remington Trajectory and Hunting Applications.  This is a down range trajectory chart for the 280 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 .284" Bullet weight 139 grains Bullet ballistic coeffecient .390 Bullet velocity 3,000 feet per second Range 100 yds. 200 yds. 300 yds. 400 yds. 500 yds. + + 1.6 0 - 7.2 - 21.1 - 43.1 2336 1951 1621 1340 1101  Varmint + + + + + +  Deer + + + + - -  Elk + + - - - -  Moose + - - - - - Copyright 2001 - 2010