ATOMIC‘s Subsonic ammunition in .223 Remington (brand part no. 00429) loads a 77-grain Nosler boat tail hollow point at 1,050 feet per second, engineered as a Tactical Cycling Subsonic round for shooters who need a subsonic load that still reliably cycles a semi-auto action. Many subsonic loads struggle to generate enough gas pressure to fully cycle a gas-operated rifle; ATOMIC tunes this load specifically to solve that problem rather than just downloading a standard round. At 1,050 fps, the 77-grain Nosler BTHP generates 188 ft-lbs of muzzle energy, quiet enough to make a real difference through a suppressor. Made in the USA and loaded in reloadable brass, this rifle ammunition ships in a reusable plastic box built for repeat trips to the range.

Key Specifications

• The chambering is .223 Remington, one of the most common AR-platform cartridges.
• The bullet weighs 77 grains, a heavier weight matched to subsonic velocity.
• The bullet is a Nosler boat tail hollow point, a precision-oriented component.
• This load is subsonic, staying below the speed of sound for a quieter shot.
• Muzzle velocity is listed at 1,050 fps, generating 188 ft-lbs of muzzle energy.
• ATOMIC engineers it as a Tactical Cycling load, tuned to reliably cycle semi-auto actions despite subsonic pressure.
• The brass case is reloadable.
• This ammunition is made in the USA.
• Cost runs about $1.20 per round, in line with specialty subsonic rifle ammunition.

Frequently Asked Questions

What does Tactical Cycling Subsonic mean? ATOMIC tunes this load to reliably cycle a semi-auto action even at subsonic pressure, where many subsonic loads short-stroke.

Is the brass reloadable? Yes, this load uses reloadable brass.

What is the muzzle velocity and energy? 1,050 fps and 188 ft-lbs of muzzle energy.

Buy ATOMIC Subsonic .223 Remington 77gr BTHP

A subsonic round that can’t cycle the gun defeats the purpose, and ATOMIC built this load specifically to solve that problem instead of ignoring it. Order from our Lubbock, Texas gun shop and it ships fast to your door.