Last reviewed: 2026-04-17 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
For competitive handloaders chasing sub-MOA groups and single-digit standard deviations, the Federal Premium Gold Medal Small Pistol Match Primer #100M stands as the benchmark. Federal manufactures these primers to tolerances that exceed industry norms — cup wall thickness, anvil geometry, and priming compound weight are held within margins that eliminate the ignition variance responsible for fliers at 25 yards. When you seat a #100M, you’re placing the same component trusted by Service Rifle competitors, Bullseye champions, and USPSA Grand Masters who reload by the thousands.
Built for the Box
Federal Premium engineered the Gold Medal line for one purpose: consistency under magnification. Each primer cup is drawn from gilding metal alloy, formed in progressive dies that maintain wall uniformity within microns. The priming compound — a proprietary blend of lead styphnate, barium nitrate, and antimony sulfide — is metered by weight, not volume, ensuring that every cup receives the same charge. The result is ignition timing that varies by less than five milliseconds across a 1000-round lot, a specification you can measure with a chronograph and ballistic software.
Specs at a Glance
| Spec | Value |
|---|---|
| Quantity | 1000 Piece |
| Primer Size | Small Pistol |
| Country of Origin | United States of America |
| Shipping Weight | 1.470 Pounds |
| DOT-Regulated | Yes |
| HazMat Product | Yes |
The #100M fits standard small pistol primer pockets — .175″ diameter, .120″ depth — and seats with hand tools or progressive presses. Federal recommends seating to a depth that compresses the anvil legs .003″ to .006″ below flush, a measurement you verify with a primer seating gauge. This compression preloads the priming compound against the anvil, ensuring reliable ignition even with light striker springs or in cold conditions. Browse our full selection of small pistol primers to compare options for precision handloading.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition components including primers cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store primers in their original packaging in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Observe the four universal rules of firearm safety when handling loaded ammunition or reloading components.
- Verify current state and local regulations governing possession and shipment of primers — some jurisdictions impose quantity limits or require permits.
- Primers contain lead styphnate; wash hands thoroughly after handling and consult California Proposition 65 warnings for exposure information.
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