PROOF Research PXT
A New Era of Rifle Barrel Technology
PROOF Exponential Twist (PXT) is a groundbreaking advancement in rifling that improves durability, accuracy and shootability.
PROOF Research developed PXT to push beyond the limitations of conventional barrels, backed by extensive military testing and research. Engineered to meet the demands of modern high-pressure ammunition, PXT represents a significant advancement in barrel technology by delivering longer barrel life, improved consistency and enhanced performance.
Unlike conventional constant-twist rifling, PXT uses a progressively changing twist profile designed to reduce initial bullet stress while maintaining rotational stability.
PXT is a complete redesign of how the bullet engages the rifling during initial rotation — an update PROOF believes is necessary as the industry advances and ammunition continues to evolve toward higher pressures and performance.
In traditional barrels, the design relies on sharp-edged rifling, and engagement forces the bullet into abrupt rifling. While the conventional approach has long defined rifle barrel design, the excessive stress can create pressure spikes, accelerated barrel wear and bullet deformation. These issues become greater with modern high-pressure cartridges, faster velocities and repetitive firing.
PXT addresses these challenges through an exponential twist rifling profile that progressively brings the bullet into rotation rather than abruptly forcing it into rotation. Combined with PROOF Research’s proprietary, smoother-edged profile, PXT reduces the twist angle by as much as 95-98% and lowers bullet engraving force by approximately 30%, creating a more controlled and gradual twist progression. The result is a barrel system capable of delivering measurable increased performance in consistency and accuracy.
Varying with barrel length and application, PXT barrels provide a 30-100% increase in barrel life by spreading degradation over much more of the bore. This redesign supports much higher pressures and velocities without shortening barrel life.
Additionally, PXT barrels provide 20-50% improvements in consistency and accuracy across multiple ammunition types and lot variations, helping maintain accuracy across a wider range of factory loads over the barrel life.
PROOF Research offers barrel options, including barrel blanks, AR barrels and select pre-fit offerings, with more coming soon. PXT barrels are also currently available in PROOF Research’s Elevation FDX and Elevation MTR (Mountain Tactical Rifle) FDX rifle platforms in the following chamberings: 22 Creedmoor, 6.5 Creedmoor, 6.5 PRC, 7mm PRC, 7mm Backcountry and 300 PRC. The Elevation FDX has a starting MSRP of $3,499, and the Elevation MTR FDX has a starting MSRP of $3,799.
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