Remington Core-Lokt ammo has provided precision shooting and big-game knockdown power for over 75 years. More hunters depend on Remington than any other because of its time-proven performance that has filled more tags on more continents than any other load. The time-proven Core-Lokt technology that has made it a legend. The original controlled expansion bullet. Its time-proven performance. The tapered copper jacket is locked to a solid lead core delivering massive 2x expansion, weight retention and consistent on-game results. There is a reason why it is considered the best-selling hunting ammuntion of all time.