AccuBond represents the most advanced bonded core bullet technology to date. Through a proprietary bonding process that eliminates voids in the bullet core, AccuBond marries Nosler's traditional copper-alloy jacket with its special lead-alloy core. The result is a bullet that flies true, penetrates deep, retains its weight and won't cause extensive barrel fouling, plus it retains 60-70% of it's weight. The white polymer tip helps protect against deformation while initiating expansion upon impact.