The AR platform has earned its reputation as one of the most versatile and customizable rifle platforms on the market, thanks in part to its wide range of available calibers. While the .223 Remington is a well-known choice, there are several other AR-compatible calibers that deserve attention for their unique advantages and applications. In this blog post, we'll explore the top 5 AR calibers that aren't .223 Remington, and highlight what makes each of them stand out.

1. 6.5 Creedmoor

Let's start with a caliber that has gained immense popularity in recent years, the 6.5 Creedmoor. Known for its exceptional long-range performance, this cartridge has proven itself both on the range and in the field. Its flat trajectory, accuracy, and widespread availability make it a compelling choice.

The 6.5 Creedmoor is primarily found in the AR-10 platform, offering versatility in hunting scenarios, from pests and varmints to mid-size game animals. Additionally, it excels in long-distance target shooting. Its availability of both carbine-length and lighter options makes it a versatile addition to any AR enthusiast's collection.

2. 6mm ARC

For those seeking a flatter shooting round without committing to the heavier AR-10 platform, the 6mm ARC is an intriguing option. Designed by Hornady to outperform many competitors, it fits into the AR-15, offering a lighter rifle with extended range capabilities.

The 6mm ARC, derived from the 220 Russian, boasts a bullet diameter of 0.243 inches. Its effective hunting range hovers around 500 yards, depending on ammunition used and game type. It has gained recognition for its performance in both special forces applications and home defense scenarios. Its precision and versatility make it a standout choice in the AR-15 world.

3. 450 Bushmaster

While the 450 Bushmaster may not be known for its long-range capabilities, it still holds a special place among AR enthusiasts. With a substantial bullet diameter of 0.4520 inches and impressive energy transfer, it delivers outstanding results within 100 yards.

Originally conceptualized by the late Col. Jeff Cooper, this cartridge provides significant stopping power. Whether used for hunting or steel target shooting, the 450 Bushmaster's performance is undeniably formidable. Its availability for handloading and custom builds adds to its appeal, making it a standout option for those who appreciate big bore ARs.

4. 300 Blackout

When it comes to close-quarters use and home defense, the 300 Blackout shines. Purpose-built for short-range encounters, it was designed by the Advanced Armament Corporation (AAC) for close-quarters battle. This cartridge performs best with subsonic rounds through a suppressor, making it ideal for discreet and quiet applications.

With a bullet diameter of 0.308 inches, the 300 Blackout is not intended for long-range engagements. However, it excels in standard house-size defensive ranges, making it a logical choice for home defense and truck guns. The addition of a suppressor enhances its stealthiness, making it a favorite among enthusiasts.

5. 308 Winchester

A classic choice that has stood the test of time, the 308 Winchester remains a favorite in the AR-10 category. Introduced in 1952, this cartridge has evolved with technological advancements while retaining its versatility. It preceded the military's 7.62x51mm NATO round and shares many similarities with it.

The 308 Winchester is a jack-of-all-trades, suitable for plinking, steel shooting, self-defense, and hunting. Its precision and wide availability make it a reliable option for various applications. While it may not reach the extreme distances of the 6.5 Creedmoor, it is a well-rounded choice appreciated by many shooters.

In conclusion, the AR platform offers a multitude of caliber options to cater to diverse preferences and needs. These top 5 AR calibers, aside from the .223 Remington, each bring unique qualities and capabilities to the table. Your choice should align with your intended use, whether it's precision shooting, hunting, home defense, or simply adding a versatile addition to your collection. What's your favorite AR caliber? Share your thoughts on our Instagram page @BrassKisses.