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The .260 Remington (also known as 6.5-08 A-Square) cartridge was introduced by Remington in 1997.Many wildcat cartridges based on the .308 Winchester case had existed for years before Remington standardized this round.
Without having personal experience with .260 i can only quote numerous internet sources (as well as this site) which claim that with 160gr bullet 6,5x55 outperforms .260 significantly and thus while 6,5x55 with 160gr is very safe moose round, lighter rounds with 6,5x55 and with .260 may result with many wounded animals (perfect shots excluded ...
7mm Remington cartridges; 7mm-08 Remington.17 Remington.17 Remington Fireball.22 BR Remington.22 Remington Automatic.22 Remington Jet.25 Remington.25-06 Remington.30 Remington.30 Remington AR.32 Remington.35 Whelen.41 Remington Magnum.44 Magnum.44 Remington Centerfire.45 Remington–Thompson.50 Remington Navy.257 Roberts.280 Remington.357 ...
After many years of dwindling use it began enjoying a mild resurgence in popularity in the mid-2000s among long range rifle enthusiasts and reloaders due to the high ballistic coefficient of the heavier 6.5mm bullets and increasing popularity of cartridges such as 6.5mm Creedmoor, .260 Remington, 6.5 Grendel, benchrest and wildcat cartridges in ...
The .280 Ackley Improved (.280 AI) was the result of the .280 Remington case modification by P.O Ackley, who pushed out the sidewalls at the shoulder to near parallel and steepened the shoulder angle to 40 degrees in order to increase powder capacity, thus along with increasing the allowable pressure, resulted in increasing the bullet initial velocity by approximately 100 fps.
The AR-15 rifle usually comes chambered for either the military cartridge 5.56×45mm or the .223 Remington. Because of the pressures associated with the 5.56×45mm, it is not advisable to fire 5.56×45mm rounds in an AR-15 marked as .223 Remington, since this can result in damage to the rifle or injury to the shooter. [1]
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The 6.5mm Remington Magnum is based on the .350 Remington Magnum necked down to accept a .264 caliber (6.71 mm) bullet. It was one of the original short, fat magnum cartridges to be put into production. The short, fat cartridge design is known to promote efficient powder burning characteristics. The SAAMI recommends a 6 groove barrel with a 1:9 ...