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Highest Rifle Velocity
5278 fps in .22-243 Middl.
5130 fps in .22-250 Ack Im

Most Powerfull Rifle
14412 ft-lbs in .700 NE
13109 ft-lbs in .50 BMG




.475 Linebaugh

The 475 Linebaugh is the creation of John Linebaugh of Maryville, MO. It is the current favorite in the contest to develop the world's most powerful revolver cartridge, a role that it fills rather well. The cartridge is based on the 45-70 Government case cut off at 1.5 inches and loaded with .475 inch diameter bullets weighing from 320 grains to 440 grains. The 475 Linebaugh, like all other super-magnum handgun cartridges, is intended primarily for hunting big game or as a backup when confronting dangerous animals. A 370 grain bullet starting out at 1495 fps develops 1840 fpe, and a 440 grain bullet at 1360 fps develops 1800 fpe. This is 108 foot pounds greater energy than the top 454 Casull loading, so we can accept the claim that the 475 Linebaugh is the world's most powerful revolver cartridge. However, there are other factors that would probably make it even more effective, because the top energy load for the 454 Casull is a 260 grain bullet at 2323 fps muzzle velocity. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.

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    Bullet weight: Bullet name: Powder:    
390 grs
412 grs
415 grs
Alliant Unique
Hodgdon H110

  Not yet verified user loads
ID: Bullet weight: Bullet name: Powder:
457 425 grs
Cast Performance Lil Gun
458 425 grs
Cast Performance Tite Group
710 400 grs
Hornady XTP FP Enforcer
711 275 grs
Barnes XPB Enforcer
712 400 grs
Speer GDSP Enforcer
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