Home › Browse Calibers › .224 TTH
Common uses: Varmint
| Type | rifle (centerfire) |
| Typical load | 70gr reference load |
| Muzzle velocity | 3650 fps |
| Muzzle energy | 2073 ft-lb |
| Published G1 ballistic coefficient | 0.29 |
| Case length | 56.72 mm |
| Overall length | 74.93 mm |
| Range (yd) | Velocity (fps) | Energy (ft-lb) | Drop (in) |
|---|---|---|---|
| 0 | 3650 | 2070 | -1.5 |
| 100 | 3269 | 1661 | 0 |
| 200 | 2920 | 1325 | -1.8 |
| 300 | 2600 | 1050 | -7.6 |
| 400 | 2299 | 821 | -18.7 |
| 500 | 2020 | 634 | -36.3 |
Small-game/varmint context — the deer- and elk-sized energy references aren't applicable to the cartridge's listed uses. When a downrange table is available, its retained-energy column can provide context; verify the exact load and follow local game regulations for legal methods.
This reference load is not verified factory-load data; confirm the displayed inputs against a reliable published source where available, and verify modeled results with your own rifle.
The .224 TTH is an overbore .22-caliber wildcat known for driving heavy 70- to 80-grain bullets at high velocity, giving it flat trajectory and retained energy well beyond the reach of standard varmint rounds. It is prized for long-range varmint and predator shooting. Realizing its potential demands a fast-twist barrel to stabilize the long bullets it was built around, and like most overbore cartridges it burns a lot of powder and works the barrel hard. As a wildcat it has no factory ammunition and requires handloading and custom or rechambered rifles. Its appeal lies in delivering big-cartridge downrange performance from a .22 bore with comparatively light recoil.
The .224 Texas Trophy Hunter (TTH) was introduced by the Texas Trophy Hunters Association in 2000, reviving a wildcat concept that Kenneth Clark of Madera, California had originally developed in 1964. It is formed from the 6mm Remington case necked down to .224 caliber, with the shoulder angle sharpened from the parent's 17 degrees to 26 degrees. Only when modern slow-burning powders and long, high-BC .22 bullets became available did the design reach its full potential, well after Clark's early experiments were limited by the components of his era.
Run this cartridge in the ballistic calculator · Compare it against another cartridge · How this data is produced