Which Reigns Supreme in Your AR?
Welcome to the ARC-off showdown—where speed, precision, and stopping power collide. Whether you’re a long-range junkie, a varmint vaporizer, or a hunter chasing big game, choosing between the 6mm ARC, .22 ARC, and .338 ARC could make or break your next build. Let’s break down these Advanced Rifle Cartridges and find out which ARC wins your heart (and your upper receiver).
Quick Hit: What’s the ARC Line All About?
Hornady’s Advanced Rifle Cartridge (ARC) family is built to squeeze the most performance out of the AR platform—longer reach, tighter groups, and heavier hits, all in semi-auto form.
Now, let’s meet the contenders.
6mm ARC – The Long-Range Sweet Spot
Think: sniper vibes, but AR-sized.
- Platform: AR-15
- Bullet: 6mm (.243)
- Role: Precision, mid-to-long range hunting, DMR
- Vibe: Hits like a .308, recoils like a kitten
- Why It Rocks: Ballistic ninja: flat, fast, and stays supersonic past 1,000 yards
Pairs beautifully with high-BC bullets - Low recoil = fast follow-ups
But Wait: Costs more than 5.56 NATO
Eats barrels faster than your standard plinker
.22 ARC – The Speed Demon
Think: .223 on a double shot of espresso.
- Platform: AR-15
- Bullet: .22 caliber (0.224)
- Role: Varminting, competition, high-speed low-drag
- Vibe: Light, fast, and flattens prairie dogs at 400 yards
- Why It Rocks: Screaming fast (~3,300+ fps)
Ultra-flat trajectory - Minimal recoil—great for all-day shooting
But Wait: Not ideal for anything bigger than coyotes
Lighter bullets mean more drift in the wind
.338 ARC – The Big-Bore Beast
Think: AR-15 with a punch that echoes.
- Platform: AR-15
- Bullet: .338 caliber
- Role: Big game hunting, tactical hammer, ELR
- Vibe: The heavyweight champ of the ARC lineup
- Why It Rocks: Elk, bear, moose? No problem.
Big energy. Big bullets. Big respect. - Great for extreme long-range setups
But Wait: Packs serious recoil, heavier, pricier, and fewer rounds per mag
Ammo availability is limited for subsonic ammo and supersonic loads (for now)
| Caliber | 6mm ARC | .22 ARC | .338 ARC |
| Platform | AR-15 | AR-15 | AR-15 |
| Use Case | Precision & hunting | Varmints & speed | Big game & impact |
| Effective Range | 800–1000 yards | 400–600 yards | 1000+ yards |
| Recoil | Mild | Feather-light | Shoulder workout |
| Ammo Cost | $$ | $ | $$$ |
| Best For | Versatile DMR builds | Competition/varmint | Big game AR builds |
Which ARC Should You Pick?
6mm ARC: Want the best mix of range, accuracy, and mild recoil? This is your go-to for a do-it-all AR.
.22 ARC: Speed freak? Pest control? Light shooter? This one’s zippy, cheap(ish), and flat-shooting fun.
.338 ARC: Hunting the heaviest hitters or building a serious AR-15? Bring the boom with .338.
Final Shots
Whether you’re punching paper at 1,000 yards, dropping varmints on the run, or chasing trophy game in the backcountry, there’s an ARC caliber built for your mission.
So—6mm ARC vs .22 ARC vs .338 ARC—who wins your next upper?
Let us know in the comments, and check out our Best AR Builds of 2025 to match your ammo to the perfect setup!
Need help finding the right barrel twist or bolt carrier group for your ARC build? Drop your questions below or hit up our caliber comparisons!
