We combined the exceptional performance of our X-TAC ammunition with the world-class ballistics of Sierra Bullets in our .308 Winchester cartridges to develop the X-TAC MATCH.  Technical Specifications MPN 308XM Bullet Type: OTM Weight: 168 grain Velocity (feet per second)   Muzzle: 2700 100 Yds: 2503 200 Yds: 2314 300 Yds: 2133 400 Yds: 1960 500 Yds: 1797 Energy (foot-pounds)   Muzzle: 2719 Bullet Path (inches)   Muzzle: -1.5 100 Yds: +2.00 200 Yds: 0 300 Yds: -8.5 400 Yds: -24.7 500 Yds: -50 Ballistic Coefficient 0.402 Bullet Length 1.220 Sectional Density 0.253