![]() ![]() ![]() If that raised your eyebrows, screw 'em back down before anybody notices - the. And if it weren't for the vast variety of projectile choices available for the 5.56, it wouldn't even be in the same arena as the 6.5 Grendel.ĭesigned by Bill Alexander and cohorts, the 6.5 Grendel uses the. May as well start at the top, right? Debatably, the 6.5 Grendel is the only cartridge that can challenge the 5.56 for the title of AR-15 versatility champ. And yes, the 5.56/.223 original M16 cartridge is one of them. If I left out your favorite, well, cowboy up and try one of these real AR-15 cartridges. Worse, unless one is able to obtain ammunition loaded to the zesty pressure levels originally advertised by designers, performance is less than ho-hum. ![]() It's not good at long range because it can't shoot high-BC bullets, it's not good for hunting because it can't shoot bullets with adequate sectional density fast enough, it's not good for competitive use because accuracy isn't particularly special and recoil is a bit high for fast work, and it's not as authoritative at moderate distances as several of the others detailed here. Why? It offers performance so indifferent in every category that it's uninteresting to me. 300 Whisper wildcat) provides distinctly more close-range authority than the 5.56/.223 and is particularly useful in suppressed firearms, but it falls apart at long range.īe that as it may, AR-15 enthusiasts have choices, and that's a beautiful thing.Īlso - and I can hear the wails of disbelief - you'll note that the 6.8 SPC cartridge isn't included. 300 AAC Blackout (which is simply a slightly modified version of J.D. While most of the "new and improved" AR-15 cartridges offer certain advantages over the original M16/AR-15 round, all but one are less versatile. 30 Remington AR - quite a capable cartridge on its own terms - failed. 308 at its best shooters saw through the farce, and the. Clearly, the latter does not showcase the. 308 Winchester - and to prove it, the company provided ballistic charts contrasting the new short, fat AR cartridge with its 125-grain Reduced Recoil. 30 Remington AR cartridge (introduced in 2008) was the ballistic equal to the. My personal favorite was Remington's statement that its new. Most frequently, new-cartridge designers point out real and perceived weaknesses in current cartridges (usually the 5.56/.223) and make sometimes practical, sometimes outrageous claims as to how their new cartridge overcomes those weaknesses. What's the motivation behind all this cartridge innovation? However, they're not readily available, so for the purpose of this article, we'll stick to SAAMI-approved factory rounds. 22 Nosler (2017).Īdditionally, wildcat cartridges for the AR-15, such as the 6mm/.223, abound. 300 AAC Blackout (SAAMI-approved in 2011) the 6.8 Remington SPC (2004) the 6.5 Grendel (2003). However, a myriad of other AR-15-specific cartridges of more-or-less usable design have cropped up in the last decade or two, including the. 223 Remington.Ĭurrently, the 5.56/.223 is still the most practical choice for the AR-15. For the better part of its life, the M16/AR-15 digested only one kind of ammunition: the twin cartridges labeled 5.56 NATO and. According to many shooters, its alleged weaknesses stem from the cartridge it chambers. In addition to being arguably the most influential rifle design of its 52 years, the AR-15 is also the most controversial. ![]()
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