The Lyman Pro Single Ammo Checker (Lyman part no. 7705200) is a precision gauge built to verify that .223 Remington/5.56 NATO ammunition, reloaded or factory, will chamber correctly before it ever sees a rifle. Drop a loaded round in, and if it seats flush the case is within SAAMI chamber tolerances; if it does not, the round gets set aside before it can cause a jam or a hard extraction at the range. Reloaders running high-volume .223/5.56 sessions use checkers like this one to catch oversized or out-of-spec cases that a caliper alone can miss.

Key Specifications

• Gauges ammunition to .223 Remington/5.56 NATO chamber specifications.
• Checks both reloaded and factory ammunition.
• Verifies fit against SAAMI chamber tolerances.
• Ships at approximately 0.331 lb.
• Uses a simple drop-in test: no calipers or measuring tools required to check a round.

Frequently Asked Questions

Can this checker test factory ammo, not just reloads? Yes, it works on both reloaded and factory .223/5.56 ammunition.

What does it mean if a round does not drop all the way into the gauge? The round is outside SAAMI chamber tolerances and should not be fired until the issue is corrected.

Buy the Lyman Pro Single Ammo Checker .223 Rem/5.56 NATO

Catch out-of-spec .223/5.56 ammo before it ever reaches the chamber. Order from Lyman through our reloading tools lineup, from our Lubbock, Texas gun shop.