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The Ultimate Reloading Manual
Wolfe Publishing Group
  • reloading manual
  • alliant reloading data
  • reloading brass
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The Ultimate Reloading Manual
hodgdon load data

.244 Remington / 6mm Remington (using Sierra bullets)

Author: Brian Pearce / Wolfe Publishing Co.
Date: May 07 2020

Both the .244 Remington and .243 Winchester were introduced in 1955. Both were based on similar wildcats developed by Fred Huntington, Warren Page and others. The .244 was based on a necked down .257 Roberts case, while the .243 Winchester was based on a necked down .308 Winchester. As a result, the .244 had greater powder capacity and could reach higher velocities. Remington viewed its cartridge primarily as a varmint round and selected a one-in-12-inch rifling twist that best stabilized 50-to 80-grain (and sometimes 90-grain) Varmint bullets. On the other hand, Winchester recognized the .243 as suitable for deer and varmints and chose a 1:10 twist value of Winchesters dual purpose cartridge, and it became widely popular while the Remington cartridge fizzled. Some reports indicated that for every .244 Remington rifle sold, there were ten .243 Winchesters sold.

Beginning in 1963, Remington renamed the .244 to 6mm Remington with all chamber dimensions being the same, and the cartridge was loaded with heavier bullets for hunting big game. Along with the new named Remington also changed the barrel twist to a one-turn in 9 inches. Either cartridge can be fired in .244 or 6mm rifles but the slow twist rate of .244 rifles will not usually stabilize 100-grain (and heavier) bullets.



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