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The 6mm Creedmoor is a necked-down version of the 6.5mm Creedmoor using 6 mm (.243 inch) bullets, lighter than 6.5 mm bullets with similarly reduced recoil. [31] John Snow at Outdoor Life built a 6mm Creedmoor rifle in 2009 for a magazine article of the wildcat cartridge that appeared in 2010, but the first documented conception of the 6mm ...
The 6×45mm cartridge provides better down range performance than the .223 Remington or the 5.56 NATO cartridges. The cartridge is currently offered by Les Baer in an AR rifle. The cartridge had been offered by Cooper Arms , Kimber and a few other rifle manufacturers in their rifles as a regular factory chambering for a period of time.
A popular 7 mm hunting caliber bullet is actually .283 in diameter (7.2 mm), but wildcat cartridges using this caliber bullet in a 5.56 x 45 case have so far not been successful. There is an existing and well-developed use of hunting-rifle bullets in the .277 caliber (6.8 mm), introduced by Winchester as the 270 in 1925.
Common rifle cartridges, from the largest .50 BMG to the smallest .22 Long Rifle with a $1 United States dollar bill in the background as a reference point.. This is a table of selected pistol/submachine gun and rifle/machine gun cartridges by common name.
Handguns are typically less accurate; at a shooting distance of 25 yd, a grouping is considered acceptable for self-defense if the shots fall within a circle of 4 to 5 inches, which is 15 to 19 MOA (equivalent to a grouping of 100-150 mm at 25 meters, which is 4-6 mils), [9] representing the shot pattern needed to hit the vital organs of a ...
For example, if we compare the .25 WSSM to the .25-06 Remington, we find that the .25-06 requires a .30-06 length action, commonly called a standard or long action. The .25 WSSM case which is almost a full inch shorter, can make use of an existing short action such as used by the 5.56 NATO and .223 Remington family of cartridges. Some ...
According to Browning, the .223 WSSM offers a 600 ft/s (180 m/s) gain with a 55 gr (3.6 g) bullet over the standard .223 Rem. It also offers a 440 ft/s (130 m/s) gain over the .22-250, a popular varmint round. This comes out to a 600 ft⋅lbf (810 J) gain over a standard .223 Rem, and a 350 ft⋅lbf (470 J) gain over the .22-250. [8]
It was developed by Rick Jamison in 1997-1998 as proven in a 2005 lawsuit Jamison vs. Olin Corporation-Winchester division. [2] Jamison was given 7 patents on the cartridge design. U.S. Repeating Arms Company used the same concept and the same base case in creating its even shorter Winchester Super Short Magnum cartridges, three of which were ...