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Subsonic & Specialty Ammo   
 • 5.56/.223 Ultra Stealth Match Subsonic
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Frangible Ammo
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 • .300 Winchester Magnum Frangible

Government & Military
 • 40mm CQB
 • 7.62/.308 Limited Penetration
 • 7.62 x 39 Facility Protection Frangible

 • 5.56/.223 Subsonic

 • .50 cal Anti Ricochet
 • 6.5 EBR

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"The Straight Dope" Information and Tools
 • READ ME Proper Use of Subsonic Ammunition
 • Why use Phosphate Removal for Subsonic Ammunition?
 • Instructions on how to use EBR Phosphate Removal

 • Ballistics Calculator
 • Greenhill Formula For Rifling Twists
 • Twist Rate, continued

 • First-Round Pop
 • Subsonics Do Not Like Long Barrels!
 • The Use of Mil-Dots & Subsonic Ammunition
 • 7.62 Thumper vs. 7.62 PBS?
 • Speed of Sound Chart
 •
Use of Subsonic Ammunition
 • Verifying Stability
 • FAQ - Frequently Asked Questions

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Special Instructions for Use of Subsonic Rifle Ammunition

9/10/2004 - SPECIAL INSTRUCTIONS FOR USE OF SUBSONIC RIFLE AMMUNITION:

1. ALWAYS ENSURE THAT THE WEAPON IS CLEAN BEFORE
FIRING SUBSONIC RIFLE AMMUNITION. A DIRTY BORE
CREATES A DANGEROUS SITUATION.

2. ALWAYS ENSURE THAT THE PREVIOUS PROJECTILE
EXITED THE BORE BEFORE LOADING OR FIRING THE NEXT
ROUND. IF IN DOUBT, STOP AND INSPECT THE BORE.

3. ALWAYS TREAT SUBSONIC RIFLE AMMUNITION AND
THE WEAPONS IT IS IN WITH THE SAME RESPECT GIVEN
ANY OTHER AMMUNITION AND WEAPON. JUST BECAUSE
IT IS QUIET DOES NOT MEAN THAT IT IS NOT AS
DANGEROUS AS ANY OTHER WEAPON SYSTEM.

These instructions are necessary because subsonic rifle ammunition is not a "one size fits all" proposition due to variances in bore size and comparative smoothness or roughness, and because chamber dimensions are not all the same. While reasonable care is exercised in the production of this ammunition and it functions in most weapons satisfactorily, it is the end user's responsibility to ensure that his particular weapon works safely with this specialized ammunition.

Engel Ballistic Research, Inc.
Phone (512) 360-5327 | Fax (512) 360-2652
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All prices FOB Smithville, Texas, U.S.A. & Subject to Change W/O Notice

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