Lindcott Armory Compare / .257 Ackley Improved vs 6.53 Lazzeroni Scramjet
Cartridge comparison
.257 Ackley Improved vs 6.53 Lazzeroni Scramjet
6.53 Lazzeroni Scramjet is faster (3,900 vs 3,400 fps); 6.53 Lazzeroni Scramjet carries more energy (3,200 vs 3,080 ft·lb).
.257 Ackley Improved →Representative trajectory · 100 yd zero0–1000 yd Open in Ballistic Compare ↗
6.53 Lazzeroni Scramjet →Representative trajectory · 100 yd zero0–1000 yd Open in Ballistic Compare ↗
| .257 Ackley Improved | 6.53 Lazzeroni Scramjet | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1945 | 1997 |
| Bullet ⌀ | 0.257″ | 0.257″ |
| Case length | — | 2.82″ |
| Velocity | 3,000–3,400 fps | 3,500–3,900 fps |
| Energy | 1,740–3,080 ft·lb | 2,300–3,200 ft·lb |
| Max pressure | 54,000 psi | 66,718 psi |
| Recoil | 9–13 ft·lb | — |
| Eff. range | 400 yd | 300 yd |
FAQs
- Is .257 Ackley Improved faster than 6.53 Lazzeroni Scramjet?
- 6.53 Lazzeroni Scramjet is faster — up to 3,900 fps versus 3,400 fps.
- Does .257 Ackley Improved hit harder than 6.53 Lazzeroni Scramjet?
- 6.53 Lazzeroni Scramjet carries more muzzle energy (3,200 vs 3,080 ft·lb).