High-Performance 300 Blackout Training Ammunition

Sellier & Bellot 300 Blackout 124 grain FMJ ammunition delivers reliable performance for tactical training, target shooting, and high-volume practice sessions. Manufactured with precision by one of the world's oldest ammunition companies, this supersonic load features brass cases and Boxer primers for shooters who demand consistency and reloadability.

Key Features

• Full Metal Jacket Construction: 124 grain FMJ bullets provide excellent penetration and consistent feeding in AR-15 platform rifles and bolt-action firearms chambered in 300 AAC Blackout
• Supersonic Velocity: 2,165 feet per second muzzle velocity delivers flat trajectory and 1,290 ft-lbs of energy for effective target engagement at extended ranges
• Reloadable Brass Cases: High-quality brass cases with non-corrosive Boxer primers allow for multiple reloading cycles, making this an economical choice for high-volume shooters
• Clean-Burning Propellant: Reduces fouling and carbon buildup in your firearm's action and barrel, extending time between cleanings
• Consistent Performance: Manufactured to exacting standards using modern production techniques and quality components for shot-to-shot reliability
• Budget-Friendly Training Rounds: Lightweight 124 grain bullet weight provides full recoil impulse at a lower cost per round compared to heavier projectiles

Technical Specifications

• Caliber: 300 AAC Blackout (300 BLK)
• Bullet Weight: 124 Grains
• Bullet Type: Full Metal Jacket (FMJ)
• Muzzle Velocity: 2,165 fps (from 16" test barrel)
• Muzzle Energy: 1,290 ft-lbs
• Case Type: Brass
• Primer Type: Boxer, Non-Corrosive
• Reloadable: Yes
• Velocity Classification: Supersonic
• Rounds Per Box: 20
• Manufacturer Part Number: SB300BLKA
• UPC: 754908512447

Compatibility

This ammunition is designed for use in all firearms chambered in 300 AAC Blackout (300 BLK), including AR-15 platform rifles with dedicated 300 Blackout barrels and upper receivers, bolt-action rifles, and single-shot firearms. Compatible with both suppressed and unsuppressed firearms, though supersonic velocity will produce audible crack even with suppressors.

What's Included

• 20 rounds of Sellier & Bellot 300 Blackout 124 grain FMJ ammunition
• Factory sealed cardboard box

Ideal For

This 300 Blackout ammunition excels in tactical training scenarios, competitive shooting drills, and extended target practice sessions where volume and affordability matter. The lightweight 124 grain FMJ bullet is perfect for shooters running high round-count training exercises who want to experience full 300 Blackout recoil characteristics without the cost of heavier subsonic or hunting loads. Also suitable for recreational plinking and zeroing optics.

About Sellier & Bellot

Founded in 1825 in Prague, Sellier & Bellot is one of the oldest continuously operating ammunition manufacturers in the world. With nearly 200 years of innovation and expertise, S&B has built a reputation for producing high-quality, affordable ammunition trusted by competitive shooters, hunters, military forces, and law enforcement agencies across the globe. Now headquartered in Vlašim, Czech Republic, Sellier & Bellot continues to combine traditional craftsmanship with modern manufacturing technology.