Factory-Tested Ammunition for Firearm Manufacturers

Atomic Ammunition is the leading supplier of factory test ammunition to the largest firearm manufacturers in the United States. We specialize in both PROOF ammunition and FUNCTION ammunition for testing nearly every major handgun and rifle caliber.

For over a decade, Atomic has delivered millions of rounds of PROOF AND FUNCTION test ammo to America’s top gunmakers, earning the trust of the most respected names in the firearms industry.

Trusted by America’s Top Gunmakers

Seven of the largest gunmakers in the U.S. trust Atomic for the first round ever fired from their firearms. That trust is earned through our commitment to precision, safety, and consistency.

Our ammunition is produced using only premium components and tested under rigorous quality control protocols. Every round of FUNCTION and PROOF test ammo is:

• Custom loaded and hand-inspected by our team
• Sampled and test-fired by an experienced ballistician
• Independently verified by third-party laboratories
• Tested using computerized equipment for consistency and performance

Reliable Testing for Every Firearm

Atomic’s PROOF and FUNCTION rounds ensure the safe and accurate testing of firearms before they are delivered to end users. This dedication to reliability has made Atomic the go-to source for manufacturers who demand excellence in every round.

Whether for handguns or rifles, our industrial test ammunition meets and exceeds industry expectations.

Industrial Ammunition by Caliber

Caliber	Type	Function Ammo	Proof Ammo
.380 Automatic	Handgun	✔️	✔️
9mm Luger	Handgun	✔️	✔️
.38 Special	Handgun	✔️	✔️
.357 Magnum	Handgun	✔️	✔️
.40 S&W	Handgun	✔️	✔️
10mm Automatic	Handgun	✔️	✔️
.44 Magnum	Handgun	✔️	✔️
.45 Automatic	Handgun	✔️	✔️
.45 Colt	Handgun	✔️	✔️
.454 Casull	Handgun	✔️	✔️
.223 Rem	Rifle	✔️	✔️
5.56x45mm	Rifle	✔️	✔️
6.5 Creedmoor	Rifle	✔️	✔️
.300 Blackout	Rifle	✔️	✔️
7.62x39mm	Rifle	✔️	✔️
.30-30 Win	Rifle	✔️	✔️
.308 Win	Rifle	✔️	✔️