This chapter honestly just scratches the surface of AR cartridges and has covered some of the more common factory chamberings specifically designed around the AR-15. Nearly anything that could squeeze its way through the magazine well has been tried, including the Winchester Super Short Magnums. The 13th Edition of Cartridges of the World has several new AR-15 cartridges like the .358 Gremlin, which are designed specifically to meet the state of Indiana’s centerfire rifle deer hunting restrictions.
And you can bet the 14th Edition will have even more. Heck, bolt-action uppers chambered for .50 BMG are available for the truly adventurous AR-15 owner. Who knows what else is to come?
As propellant and bullet technologies advance, expect to see has-been cartridges revisited and revamped. Somewhere, someoner will need a round tailored to a very specific purpose, and it is very likely an AR-15, M-16, or M-4 will be able to chamber that round and get the job done better than any other rifle around. All that is needed is for some enterprising wildcatter to step up and design the next best thing.
This article appeared in the Gun Digest the Magazine 2013 Shooter’s Guide. Click here to load up on a subscription.
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