Atomic ATM 223 Rem Subsonic 77gr HPBT — 50rd

Atomic's match-grade subsonic .223 Rem ammunition is loaded with a 77‑grain hollow-point boat‑tail bullet and is designed for reduced velocity and low recoil. Each box contains 50 rounds loaded in brass cases and marked as reloadable. Published performance details list an approximate muzzle velocity of 1050 fps and muzzle energy of 188 ft·lbs. The load is intended for subsonic roles and precision-oriented applications where reduced velocity is required.

Key Specifications

• The cartridge is chambered in .223 Rem / 5.56 NATO.
• The bullet weight is 77 grains.
• The projectile is a hollow-point boat-tail (HPBT) design.
• Each box contains 50 rounds.
• The listed muzzle velocity is approximately 1050 fps.
• The listed muzzle energy is approximately 188 ft·lbs.
• The cases are made of brass.
• The ammunition is marked as reloadable.
• There are 10 boxes per case.
• Packaging includes a reusable plastic box and the product is noted as Made in the USA.

This subsonic load provides a consistent, low‑recoil option for shooters configuring suppressed or subsonic-capable rifles. The 77‑grain HPBT profile aids in stable flight characteristics for precision-oriented use, while brass cases and reloadability give practical value to handloaders. Packaged in a 50‑round reusable box, this ammunition is designed for specialized subsonic and precision applications where controlled velocity and reliable feeding are priorities.