The .244 Remington was introduced in September 1955, the same year as the .243 Winchester. It is essentially a .257 Roberts necked down to .243 diameter. Remington originally intended it to be a varmint and predator cartridge.
The Remington Model 722 and 725 were the first to be chambered for this round. The barrels chambered for this cartridge had a 1-in-12-inch twist. The first factory loadings were a 75-grain pointed soft point bullet with an advertised muzzle velocity of 3,500 feet per second and a 90-grain pointed soft point bullet with a velocity of 3.200 feet per second.
The .244 Remington was never very popular because of the 1-in-12-inch twist. One hundred grain bullets could not be stabilized with this slow twist. As a result, the .243 Winchester outstripped the .244 Remington in popularity. Rifles chambered for the .243 Winchester had a 1-in-10-inch twist and were able to stabilize the longer 100-grain pointed bullets with no trouble at all. One hundred grain bullets are naturally better for hunting deer-sized animals.
In an effort to keep what Remington considered to be a good cartridge from becoming obsolete, they renamed the cartridge in 1963, calling it the 6mm Remington. The new rifles chambered for the renamed cartridge had a 1-in-9-inch twist that could stabilize any .243 diameter commercially manufactured bullet.
Today, the 6mm Remington has a small ballistic advantage over the more popular .243 Winchester because of a slightly larger powder case capacity. The first factory loading for the 6mm were an 80-grain bullet with an advertised muzzle velocity of 3,480 feet per second and a 100-grain bullet at 3,130 feet per second. The case dimensions for the two cartridges are identical, and the only difference in the loads is the headstamp markings.
The popularity of the .244/6mm Remington increased, but it never came close to the popularity of the .243 Winchester. In the accuracy department, both cartridges are equal to about 300 yards.
Since the introduction of the 6mm Remington, I think that just about every manufacturer of centerfire bolt-action rifles have chambered a model for this cartridge.
A 6mm Remington would be considered an excellent choice in a hunting rifle for a woman or a small male youth hunter. The recoil is insignificant, and it can be used for varmint hunting as well as hunting deer-sized game.
The 6mm Remington appears to be favored by handloaders over the .243 because the cartridge has a longer neck, which means it is easier to reload.
Below are three handloads for the .244/6mm Remington:
1. Case - Remington
Primer Remington 9 1/2 (Large Rifle)
Bullet Speer 80-grain Spitzer Soft Point
Powder & Weight: IMR 4895/39.0 grains
Note: Long-range varmint load
2. Case - Remington
Bullet - Speer 90-grain Spitzer Soft Point
Powder & Weight: IMR 4064/38.0 grains
Note: For rifles having 1-in-12-inch twist; Excellent for small varmints and coyote
3. Case - Remington
Bullet Hornady 100-grain Pointed Soft Point
Powder & Weight: IMR 4350/40.5 grains
Note: Good whitetail and antelope load