The Barnes Tipped Triple Shock X, or TTSX for short, was a spin off of the Barnes TSX. The TTSX has improved on perfection with the addition of a streamlined polymer tip. Like the TSX, The TTSX has is an all copper bullet and as a result provides you with improved accuracy, increased velocity and reduced barrel fouling. With all those features it is clear to see how the Barnes TTSX earned a reputation as on of the most dependable and deadliest bullets you can buy.Specifications:MPN: 30372Lead Free Projectile.30 Caliber.308" Diameter180 Grain TTSX Solid Copper Polymer Tip Boat TailLength 1.488Ballistic Coefficient 0.484Sectional Density 0.271Recommended Twist Rate 1:11" or Faster50 Projectiles Per BoxNote: These are projectiles only. They are used for reloading ammunition. This is not finished ammunition that is ready to fire.