The 6.53 Lazzeroni Scramjet is the .257-caliber member of the Lazzeroni proprietary family. It rivals the .257 Weatherby Magnum in velocity while using the same Lazzeroni case as the rest of the line.
Type: Rifle
Introduced: 1997, USA
Standardization: Proprietary
Bullet diameter: 0.257" (6.53 mm)
Case length: 2.82" (71.63 mm)
Overall length: 3.53" (89.66 mm)
Rim type: Rimless
Primer: Large Rifle Magnum
Muzzle velocity: 3500–3900 fps
Muzzle energy: 2300–3200 ft-lbs
Effective range: 300 yd
Common bullet weights: 85, 100, 115 gr
Primary use: hunting
Production status: Active
Also known as: 6.53 Scramjet · Lazzeroni Scramjet
History: Part of the Lazzeroni Arms Company line designed in the mid-1990s, the Scramjet gives .257-caliber hunters flat-shooting performance at ranges beyond what conventional commercial cartridges provide. Like all Lazzeroni offerings, components are available exclusively through Lazzeroni Arms.
Notable firearms: Lazzeroni Long Magnum Sporter
Similar cartridges: .257 Weatherby Magnum, .25-06 Remington, .257 Roberts Ackley Improved