Sig Sauer Elite Performance 300 Blackout Subsonic 220gr

Product Description

Sig Sauer Elite Performance 300 Blackout Subsonic 220gr is centerfire rifle ammunition designed to remain below the speed of sound when fired. This subsonic load is built for shooters using suppressed .300 Blackout rifles who want to eliminate both the sonic crack and mechanical noise.

Subsonic ammunition travels slower than 1,125 feet per second, so the bullet does not create a supersonic shockwave. When paired with a suppressor, the result is significantly quieter operation compared to standard supersonic loads.

The 220 grain bullet weight is heavy enough to stabilize in standard .300 Blackout barrels while staying subsonic. This makes it well-suited for close-range work, hog hunting at night, and training where noise reduction matters.

Key Facts

• Brand: Sig Sauer
• Caliber: .300 Blackout
• Bullet Type: Subsonic
• Grain Weight: 220 Grain
• SKU: E300A2-20

Why Subsonic 300 Blackout Matters

The .300 Blackout cartridge was designed from the ground up to work with both supersonic and subsonic loads in the same rifle. Subsonic rounds like this 220 grain offering cycle reliably in AR-15 platform rifles without requiring adjustments to the gas system.

Heavier bullets perform better at subsonic velocities because they retain more energy and stabilize more predictably. A 220 grain projectile delivers terminal performance at shorter distances without the ear-splitting crack that accompanies faster loads.

If you run a suppressed .300 Blackout for hunting or home defense, subsonic ammunition eliminates the need for hearing protection while maintaining function. The tradeoff is reduced effective range compared to lighter, faster bullets.

What to Know Before You Buy

Subsonic .300 Blackout ammunition requires a barrel with an appropriate twist rate to stabilize the heavier projectile. Most factory .300 Blackout barrels use a 1:7 or 1:8 twist, which handles 220 grain bullets without issue.

If you are shooting unsuppressed, you will still hear the mechanical noise of the action cycling. The subsonic advantage is most noticeable when a suppressor is installed, as it eliminates both sources of report.

This ammunition is not the same as reduced-recoil or practice loads. It is a full-power cartridge optimized for sound suppression and close-range terminal performance.

Buying from Western Sport in Roanoke, TX

Western Sport is a licensed FFL/SOT dealer serving the North Texas and DFW area since 2007. We offer gunsmithing services on site and can assist with transfers and special orders. Call 817-393-4000 to confirm specifications or place an order.

Frequently Asked Questions

Q: Is 220 grain 300 Blackout subsonic accurate at 100 yards?

A: Yes, 220 grain subsonic .300 Blackout can be accurate at 100 yards when fired from a rifle with the correct barrel twist rate. Most shooters see acceptable groupings at that distance, though the heavy bullet drops more significantly than lighter supersonic loads. Zeroing at 50 yards is common for subsonic use.

Q: Will this ammunition cycle in a standard AR-15 chambered in 300 Blackout?

A: Yes, subsonic .300 Blackout ammunition is designed to cycle in standard AR-15 rifles chambered for .300 Blackout without modification. The cartridge was engineered specifically to function with both subsonic and supersonic loads using the same gas system.

Q: Do I need a suppressor to use subsonic 300 Blackout?

A: No, you do not need a suppressor to fire subsonic .300 Blackout ammunition safely. The ammunition will function normally in any .300 Blackout rifle. However, the noise reduction benefit of subsonic ammunition is only fully realized when a suppressor is installed, as unsuppressed subsonic rounds still produce mechanical noise from the action.

Q: What is the difference between 220 grain subsonic and 125 grain supersonic 300 Blackout?

A: The 220 grain subsonic round travels below the speed of sound and produces no sonic crack, making it ideal for suppressed shooting. The 125 grain supersonic load travels faster, offers a flatter trajectory, and delivers more energy at longer distances. Subsonic rounds excel at close range with a suppressor; supersonic rounds perform better beyond 100 yards.

Q: Can I mix subsonic and supersonic 300 Blackout in the same magazine?

A: Yes, you can load subsonic and supersonic .300 Blackout ammunition in the same magazine, and both will cycle in the rifle. However, they have very different points of impact due to the velocity difference, so mixing them is not practical for precision shooting. Most shooters keep them separate and re-zero when switching loads.

Q: How do I buy ammunition from Western Sport?

A: You can purchase ammunition by visiting our location in Roanoke, TX, or by calling 817-393-4000 to place an order. As a licensed FFL dealer, we follow all federal and state requirements for ammunition sales. Bring a valid ID and be prepared to complete any required paperwork at pickup.

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