The 5.56 NATO/.223 Rem. and the .300 BLK are two popular cartridge options for the AR-15. Which one should you choose? Here's a quick rundown of the background and capabilities of each round.
If you're interested in reloading .300 Blackout, there are a number of must-have materials that will get you on the road to shooting handcrafted, high-quality, low-price ammo.
If you're looking to get the most bang for your buck, getting an AR-platform rifle in these budget calibers is probably your best bet. Our Ammo editor rounds up his favorite offerings.