The Barnes Tipped TSX features a 100-percent copper body with rings cut into the shank. A polymer tip boosts the ballistic coefficient, improves long-range ballistics and provides fast expansion. The four razor sharp cutting petals double the bullet diameter making delivering "dead right there" performance. These revolutionary bullets from Barnes are made of 100% copper and contain no lead. Barnes recommends initially seating bullets 0.050" off the lands. Best accuracy will be found from 0.030" to 0.070" depending on the rifle. This is not loaded ammunition.