Remington .30-30 Win 170 Gr Core-Lokt SP - 20 Round BoxRemington has refined their Core-Lokt series of hunting ammunition for more than 75 years creating a highly effective technology for the modern hunter. Core-Lokt technology creates a channel within the lead core of a bullet that allows the copper jacket to remain seated firmly around its core delivering consistant expansion weight retention and knockdown ability. Since 1939 Remington has been providing these precision big-game rounds to hunters. This is the original controlled expansion bullet. All Remington Express loads feature reloadable brass cases and non-corrosive boxer primers. These 30-30 Winchester cartridges utalize a broad soft-point design which helps the bullet expand rapidly on impact instead of shearing right through targets.