Best Bulk 5.56 Ammo: Cheapest Ways to Feed Your AR
January 28, 2026 · AmmoBin.com
If you shoot an AR-15 regularly, buying 5.56 in bulk is the single biggest way to cut your cost per round. Here is what to buy and how to time it.
What to buy for bulk practice
55gr or 62gr FMJ/M193/M855-style loads are the workhorses. Brass-cased is reloadable and range-friendly; steel-cased is cheaper but not allowed at some ranges and harder on extractors over time.
How to time a bulk buy
Ammo prices swing with demand and events. Use the 5.56 price history to see whether prices are near a recent low before committing to a case. Compare current 5.56 NATO listings by true cost per round.
Frequently asked questions
Is bulk 5.56 cheaper?
Yes — buying by the case (typically 500–1,000 rounds) almost always lowers the cost per round and spreads shipping across more rounds.
Is steel-cased 5.56 bad for my AR?
It is cheaper and fine for casual use, but it's not allowed at some ranges and can increase extractor wear over very high round counts. Brass-cased is the safer all-around choice.
Compare live prices
