Originally posted by ThreeFingerPete
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".45-90 Sharps (also called .45-90 WCF) is a non-wildcat conversion for the Marlin 1895. The .45-90 is more than a quarter inch longer than the .45-70 allowing the powder capacity necessary to achieve muzzle energies upwards of 4,000 ft-lbs in modern firearms. These high pressure loads are referred to as ".45-90 Express" and are not safe for use in Marlin lever action rifles manufactured prior to 1948 (nor any other non-modern .45-90 firearm). The .45-90 Express is the most powerful conversion available for the .45 caliber Marlin 1895 that does not require a replacement barrel. The .45-90 conversion involves modifications to the action that increase the bolt travel and action timing (to adjust when a round is ejected, and when a new round lifts to enter the chamber), and the chamber in the barrel is reemed to .45-90 Sharps."
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