Last reviewed: 2026-04-18 by Jake Terry, FFL07/SOT3, NRA-certified firearms instructor.
Fort Scott Munitions engineers the TUI 300 AAC Blackout load around a 115-grain solid copper projectile that tumbles through tissue rather than expanding on impact. Launched at 2219 feet per second from a 16-inch test barrel, this supersonic round delivers 1257 foot-pounds of muzzle energy with a G1 ballistic coefficient of 0.24. The Tumble Upon Impact mechanism relies on physics — when the monolithic bullet encounters water-based tissue, its geometry forces end-over-end rotation, carving wound channels that conventional hollow points cannot replicate. Brass cases accept Boxer primers and reload without lead exposure, meeting California Proposition 65 requirements while maintaining consistent terminal performance across medium game at typical 300 Blackout engagement distances.
Performance at a Glance
Each TUI projectile starts as a solid copper rod machined on CNC lathes to tolerances tighter than swaged or cast bullets. Fort Scott removes the variables — no jacket separation, no core fragmentation, no petals that may or may not open. The monolithic construction penetrates bone and hide without deformation, then tumbles to maximize internal disruption. At 2219 fps, this load stays supersonic past 200 yards from a carbine-length barrel, giving you flat trajectory and predictable wind drift on whitetail, hogs, and coyotes where 300 Blackout’s .30-caliber bore diameter outperforms 5.56 NATO without requiring subsonic loads or suppressors.
| Spec | Value |
|---|---|
| Caliber | 300 AAC Blackout (7.62x35mm) |
| Bullet weight | 115 grains |
| Bullet type | Solid copper (TUI) |
| Muzzle velocity | 2219 fps (16-inch barrel) |
| Muzzle energy | 1257 ft-lbs |
| G1 ballistic coefficient | 0.24 |
| Velocity rating | Supersonic |
| Rounds per box | 20 |
| Case | Brass |
| Primer | Boxer |
| Corrosive | No |
| Reloadable | Yes |
| Lead free | Yes |
| Intended use | Hunting |
| Country of origin | United States |
The 115-grain weight sits between lightweight varmint loads and heavy subsonic options, giving you supersonic flight with less felt recoil than 150-grain hunting rounds. Brass cases eject cleanly and hold primers through multiple reloading cycles — Fort Scott specs non-corrosive Boxer primers that seat consistently when you’re working up handloads. For hunters running AR-15 platforms in 300 AAC Blackout, this load cycles standard carbine gas systems without the gas port enlargement required by subsonic ammunition, and the lead-free construction meets restrictions at indoor ranges and California hunting zones.
Safe Handling & Compliance
Federal law requires purchasers to be at least 18 years old for rifle and shotgun ammunition, and at least 21 for handgun ammunition. Ammunition cannot be shipped to certain states, counties, and cities — review our ammunition shipping restrictions before ordering. Store ammunition in a cool, dry location away from heat sources and out of reach of unauthorized users.
- Observe the four universal firearm safety rules: treat every firearm as loaded, never point at anything you’re not willing to destroy, keep your finger off the trigger until ready to fire, and know your target and what lies beyond it.
- Verify that 300 AAC Blackout ammunition matches your firearm’s chamber marking — never load 300 Blackout into a 5.56 NATO or .223 Remington chamber, as catastrophic overpressure will result.
- This ammunition is DOT-regulated for shipping and must be stored per local fire codes; lead-free construction eliminates Proposition 65 lead exposure warnings but copper fouling still requires regular barrel cleaning with copper solvent.
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