shanneba
Professional
Sounds interesting especially for the higher-pressure rounds.
The Columbia Falls, Montana, company announced this week the launch of PROOF Exponential Twist, or PXT, a barrel technology that rethinks how a bullet engages the rifling at the moment of ignition. The claims attached to it are substantial: 30 to 100 percent longer barrel life depending on length, and 20 to 50 percent improvements in consistency and accuracy across multiple ammunition types and lot variations. Compatibility with the higher-pressure cartridges that conventional barrels often struggle to handle without significant wear in the first two inches of the bore.
Where traditional barrels start at 1:7-inch to 1:10-inch twist rates at the breech, PXT barrels begin in the range of 1:250-inch to 1:500-inch before accelerating through the bore. The bullet enters the rifling rotating almost not at all and picks up rotational speed progressively as it travels down the barrel. PROOF claims this reduces the initial engagement angle by 95 to 98 percent.
The rifling profile itself has also been redesigned. Traditional sharp-edged rifling is efficient to manufacture and grips the bullet jacket aggressively, but it wears faster and deforms projectiles under high pressure. PXT uses a proprietary smoother-edged profile that PROOF says reduces bullet engraving force by approximately 30 percent, meaning less deformation, less wear on the lands and a more gradual transfer of energy into rotation.
www.ssusa.org
The Columbia Falls, Montana, company announced this week the launch of PROOF Exponential Twist, or PXT, a barrel technology that rethinks how a bullet engages the rifling at the moment of ignition. The claims attached to it are substantial: 30 to 100 percent longer barrel life depending on length, and 20 to 50 percent improvements in consistency and accuracy across multiple ammunition types and lot variations. Compatibility with the higher-pressure cartridges that conventional barrels often struggle to handle without significant wear in the first two inches of the bore.
Where traditional barrels start at 1:7-inch to 1:10-inch twist rates at the breech, PXT barrels begin in the range of 1:250-inch to 1:500-inch before accelerating through the bore. The bullet enters the rifling rotating almost not at all and picks up rotational speed progressively as it travels down the barrel. PROOF claims this reduces the initial engagement angle by 95 to 98 percent.
The rifling profile itself has also been redesigned. Traditional sharp-edged rifling is efficient to manufacture and grips the bullet jacket aggressively, but it wears faster and deforms projectiles under high pressure. PXT uses a proprietary smoother-edged profile that PROOF says reduces bullet engraving force by approximately 30 percent, meaning less deformation, less wear on the lands and a more gradual transfer of energy into rotation.
An NRA Shooting Sports Journal | PROOF Research Unveils PXT Rifle Barrel Technology
PROOF Research’s new PXT exponential twist barrel technology promises longer barrel life and improved accuracy, available now in the Elevation FDX rifle lineup.
