Many AR-15 rifle manufacturers now offer the. Reloading data from Hornady, using commercially available powders, indicate velocity peaking at just under 4,200 ft/s (1,300 m/s) with the 32-grain (2.1 g) bullet in longer barrels. The propellant features a de-coppering agent that helps prevent fouling. To achieve these velocities, the factory uses a proprietary powder composition known internally as SMP746, specially formulated by Primex, and not currently (2013) available to handloaders. The Hornady factory load is listed at 4,225 ft/s (1288 m/s) with a 32-grain (2.1 g) bullet. 204 inches (5 mm) and shoulder moved forward and angle increased to 30 degrees. To make the 204 Ruger, the 222 Remington Magnum case was necked down to. The 222 Remington Magnum provides about 5% more usable (below the neck) case capacity than the most popular member of the family, the NATO 5.56×45mm (.223 Remington). Only the European 5.6×50mm Magnum is larger, which itself is a lengthened version of the 222 Remington Magnum. 222 Remington Magnum, which has the second largest case capacity in the family that began with the. 204 Ruger was the second highest velocity commercially produced ammunition and the only centerfire cartridge produced commercially for bullets of. At the time of its introduction in 2004, the. 204 Ruger is a centerfire rifle cartridge developed by Hornady and Ruger. (1.55 g) Hornady Super Performance Varmint Ammunition JSTOR ( January 2013) ( Learn how and when to remove this template message)Ģ4 gr.Unsourced material may be challenged and removed. Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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