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Magtech 300 Blackout 200 Grain Subsonic FMJ

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Ammo Reports Team 20 300 Blackout

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Data is based on official manufacturer sources. Found an error? Send us the source link.

Manufacturer: Magtech. Exact official product pages and technical documents are recorded in the editorial verification log. Any retailer-listed field is labeled.

Ballistics Table

Official-data note: The current Magtech catalog publishes muzzle velocity, energy, test barrel length, and BC, but not a complete distance table. Unverified estimates are omitted.

Key takeaway: Magtech lists 1017 fps, 459 ft-lbs, a 16-inch test barrel, and BC 0.560 for symbol 300BLKSUBA.

Related 300 Blackout factory loads on Ammo Reports: Federal American Eagle 150 Gr FMJ, Hornady Custom 110 Grain CX, and Hornady Subsonic 190 Gr Sub-X.

Why This Load Exists

The 300 AAC Blackout cartridge was engineered from the ground up to cycle reliably through AR-15 platforms at both supersonic and subsonic velocities, with suppressor use as a central design requirement. Subsonic loads in the 200–220 gr range occupy the upper end of that spectrum — keeping the bullet below the speed of sound (~1,125 fps at sea level) eliminates the ballistic crack that makes supersonic fire loud even through a suppressor.

Magtech’s 200 gr subsonic FMJ addresses the recreational end of this market. The FMJ construction is not optimized for terminal expansion, which is appropriate for paper and steel target work but disqualifies the load for hunting in most jurisdictions. The 200 gr weight sits slightly lighter than the most common subsonic benchmark (220 gr), which can offer marginally flatter trajectory while remaining reliably subsonic under normal atmospheric conditions. This weight is a practical middle ground between the heaviest subsonic offerings and the supersonic spectrum, and Magtech’s brass-cased, Boxer-primed construction makes it compatible with standard AR-15 bolt carriers and gas systems configured for subsonic cycling.

Best Uses

Good fit:

• Suppressed recreational shooting where noise reduction is the primary goal
• Steel and paper target practice at ranges under 150 yards
• Training and familiarization with suppressed .300 Blackout platforms
• Indoor or urban range environments where over-penetration with expanding bullets is a concern
• Shooters seeking a budget-accessible subsonic load for high-volume range sessions

Not the right tool for:

• Hunting applications that call for an expanding bullet; verify the applicable regulations before use
• Engagements beyond 200 yards, where trajectory drop becomes difficult to manage without a dedicated holdover system
• Self-defense or home defense applications where terminal performance matters
• Platforms with gas systems tuned exclusively for supersonic loads — cycling reliability with subsonic ammunition depends heavily on suppressor use or a properly adjusted gas block
• Competitors or precision shooters requiring published BC and velocity data for ballistic solver input

Reliability Notes

No structured submissions yet.

Based on manufacturer claims and open-source product descriptions, Magtech positions this load as a consistent performer for recreational use. The brand emphasizes quality-controlled assembly using brass cases and non-corrosive Boxer primers — construction details that support reliable feeding and extraction in AR-15 pattern rifles. Magtech’s ammunition manufacturing history in Brazil under CBC (Companhia Brasileira de Cartuchos) gives it a long production track record with military and law enforcement contracts, which informs their quality control standards for commercial loads.

Open-source user observations on subsonic .300 Blackout loads generally note that reliable cycling without a suppressor can be inconsistent across platforms — this is a characteristic of the subsonic pressure curve, not specific to Magtech. A suppressor or an adjustable gas block is typically required for consistent bolt cycling with 200 gr subsonic loads. These notes come from open sources and manufacturer claims, not structured data collected by this database.

Competitors

This is the full comparison set preserved from the article’s existing competitor list. A link is added only when an exact Published review exists on Ammo Reports. Unverified competitor fields are labeled accordingly.

Price Reality

Retail prices and availability change. Compare the current store listings below and verify SKU 300BLKSUBA and the exact 50-round package before purchase. Price is not used to determine the technical data or editorial conclusion.

Where to Buy

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