The .500 Auto Max was designed by Big Horn Armory for use in their AR500 rifle, which is based on the AR-10 sized platform. The .500 Auto Max is essentially a rimless .500 S&W Magnum. It is a very versatile cartridge; it can handle anything from prairie dogs to pachyderms to Peterbilts, truck stopping power in a platform weighing less than 10 pounds. The .500 Auto Max uses the same reloading dies, shell holders & load data as the .500 S&W Mag, with the exception of requiring a taper crimp instead of the standard roll crimp. This is due to the Auto Max headspacing off of the mouth of the case instead of the rim.
**WARNING** In firearms that use a floating firing pin (such as the AR-15 and its variants), dropping the bolt on a chambered round could lead to a slam fire. It is important that these firearms are loaded from the magazine so that the bolt loses inertia when it strips a round from the magazine. It is also important NOT to use sensitive primers that aren’t designed for use in an AR, as this increases the chance of a slam fire.
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* Starline Brass does not sell any loaded ammunition. What you are purchasing are brass cases only and will need to be loaded into ammunition in order to be fired from a firearm.
