Federal Gold Medal Match Large Rifle Primers – GM210M

Overview:

The Federal GM210M is a Gold Medal® Match-grade large rifle primer designed for precision rifle shooters and reloaders. This primer is known for ultra-consistent ignition, tight manufacturing tolerances, and low standard deviations, making it ideal for long-range shooting, benchrest competitions, and high-performance hunting loads.

Key Specifications:

Attribute	Details
Primer Type	Large Rifle Match Primer
Product Code	GM210M
Brand	Federal Premium
Series	Gold Medal® Match
Cup Type	Standard cup hardness (not magnum)
Priming Mix	Non-corrosive, non-mercuric, stable across temperature ranges
Size	Large rifle (0.210″ diameter)
Packaging	Typically in boxes of 100 or cases of 1000
Country of Origin	Made in the USA

Design Features:

Match-grade manufacturing standards: Each batch of GM210M primers is tested for consistency in ignition, sensitivity, and performance.
Strict quality control: Only the most uniform lots of priming mix and components are used.
Precision tolerances: More consistent than standard large rifle primers.
Clean, reliable ignition: Designed to ignite a wide range of propellants cleanly, particularly in precision reloads.

Intended Applications:

Application Type	Description
Precision rifle loads	Ideal for calibers like .308 Win, 6.5 Creedmoor, .30-06, .300 Win Mag
Long-range shooting	Trusted in PRS, F-Class, and benchrest disciplines
Hunting loads	Used in high-end custom hunting ammunition
Target shooting	Excellent for competition and sub-MOA group performance

Comparison to Other Large Rifle Primers:

Primer	Cup Hardness	Match Grade	Sensitivity	Notes
Federal 210	Standard	No	Standard	General-purpose large rifle primer
Federal GM210M	Standard	Yes	Optimized	Match version of the 210
CCI 200	Slightly harder	No	Moderate	Durable for heavy bolt strikes
CCI BR-2	Slightly harder	Yes	Moderate	Match-grade competitor to GM210M
Winchester LR	Standard	No	Moderate	Versatile, less consistent than GM210M

Performance Notes:

Velocity consistency: Chronograph data often shows low SDs (standard deviations) and tight ES (extreme spreads) when using GM210M.
Reliable ignition: Especially effective with powders like Varget, H4350, IMR 4064, RL-15, and H4831.
Recommended by competitive reloaders for its uniform flame propagation and primer cup thickness that balances reliability and sensitivity.

Reloading Considerations:

Primer Pocket Fit: Standard large rifle primer pockets. Always clean and uniform pockets for best seating.
Seating Depth: Seat 0.003–0.005″ below flush for optimal ignition.
Powder Compatibility: Performs well with extruded and ball powders alike.
Sensitivity: Slightly more consistent than standard 210s; good for match triggers but still safe in most bolt guns.

Packaging & Availability:

Sold in 100-count trays and 1000-count bricks.
Part of Federal’s premium match line, availability can vary due to high demand from precision reloaders.
Prices typically range from $80 to $130 per 1000, depending on market conditions.

Community & Expert Reviews:

Widely respected by long-range and benchrest shooters.
Often mentioned in handloading guides and by precision shooting forums (e.g., Sniper’s Hide, Accurate Shooter).
Known for being one of the most consistent large rifle primers on the market.

Summary:

Federal GM210M primers are engineered for shooters who demand absolute consistency and match-winning performance. With rigorous testing, tight quality controls, and performance favored by pros, they are a go-to choice for competitive reloaders and long-range shooters.