Federal Premium Gold Medal AR Match Grade Small Rifle Primers #GM205MAR Box of 1000 (10 Trays of 100)

Clear Product Overview

The federal premium gold medal ar match grade small rifle primers gm205mar 1000-count brick (packaged as ten 100-count trays) is custom-engineered for modern semi-automatic rifles and high-volume AR-15 match shooting. Combining Federal’s legendary Gold Medal Match consistency with a thickened primer cup, the #GM205MAR provides ultimate protection against free-floating firing pin slam-fires in semi-automatic actions. Handloaders gain precision match-grade velocity consistency and shot-to-shot reliability without compromising safety in high-rate gas-operated platforms.

Relevant Specifications

• Brand: Federal Premium

• Product Line: Gold Medal AR Match Primers

• Part Number: GM205MAR / Gold Medal AR Match

• Primer Size: Small Rifle AR Match (#GM205MAR Specification)

• Quantity: 1,000 Primers (10 Plastic Trays of 100 Primers Each)

• Chemical Mix: Match-Grade, Non-Corrosive, Non-Mercuric Priming Mix

• Cup Construction: Hardened/Thickened Brass Alloy Cup (MIL-SPEC style bridge construction)

• Intended Firearms: Semi-Automatic AR-15 & AR-10 Platform Rifles, Bolt-Action Precision Rifles

• Intended Calibers: .223 Remington, 5.56x45mm NATO, 6.5 Grendel, 6mm ARC, 300 AAC Blackout, .204 Ruger

• Country of Origin: Made in the USA

Real-World Use Information

Competitive 3-Gun shooters, High Power service rifle competitors, and precision AR handloaders choose federal premium gold medal ar match grade small rifle primers gm205mar to resolve unique semi-automatic loading challenges. Because floating firing pins in military-style rifles tap the primer face during cycling, standard commercial small rifle primers risk unintentional slam-fires or cratering under high pressure. The #GM205MAR features a heavy-duty cup designed to safely withstand floating pin contact and high pressure spikes while delivering micro-gram uniformity in chemical payload for sub-MOA precision downrange.

Compatibility & Requirements

• Cartridge Compatibility: Ideal for high-pressure, high-capacity small rifle cartridges including .223 Remington, 5.56mm NATO, 6.5 Grendel, 6mm ARC, 22 Nosler, and 300 Blackout.

• Firearm Compatibility: Engineered specifically for AR-15, M4, M16, and semi-automatic sporting rifles. Also works exceptional well in bolt-action rifles where tough primer cups are preferred.

• Tool Compatibility: Fits all standard hand-held, bench-mounted, and progressive reloading presses and priming tools.

Pros & Limitations

Pros:

• Slam-Fire Resistant: Tougher primer cup prevents floating firing pin detonation during high-speed action cycling.

• Match-Grade Accuracy: Gold Medal manufacturing standards minimize extreme velocity spreads (ES) and standard deviation (SD).

• High-Pressure Performance: Prevents primer piercing and cratering in hot 5.56 NATO and 6.5 Grendel handloads.

• Non-Corrosive Formula: Safeguards gas tubes, bolt carrier groups, and barrels against chemical rust and pitting.

Limitations:

• Firing Pin Weight Requirements: Requires standard or military-weight firing pin strikes; lightened competition hammer springs in bolt-action rifles may cause misfires.

• Premium Pricing: Costs more than standard non-match commercial small rifle primers.

Frequently Asked Questions (FAQs)

Q: How do Federal GM205MAR primers differ from standard Federal 205 or 205M primers?

A: The GM205MAR uses a thicker, harder cup designed specifically to withstand floating firing pin contact in AR-15 rifles and resist piercing under high pressures, whereas 205 and 205M feature softer cups intended primarily for bolt-action rifles.

Q: Can I use Federal GM205MAR primers in bolt-action rifles?

A: Yes, as long as your bolt-action rifle has a standard firing pin spring weight capable of reliably detonating military-grade/hardened primer cups.

Q: Are Federal Gold Medal AR Match primers non-corrosive?

A: Yes. All Federal Gold Medal primers feature modern, non-corrosive, non-mercuric chemical formulations that keep your action, bore, and gas system clean.

Shipping & Delivery Information

• HazMat Classification: Shipped as Hazardous Material (UN0044, Primers, cap type) in compliance with DOT regulations.

• Shipping Restrictions: Ships via ground transport within the Continental United States only. Cannot ship to P.O. Boxes, APO/FPO addresses, or internationally.

• Adult Signature Required: Delivery requires an adult signature upon arrival.

• Final Sale: Due to federal safety and hazardous material shipping regulations, all primer sales are final and non-returnable.

 

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