Hornady American Whitetail 243win 100gr BTSP Ammunition is loaded with Hornady's legendary InterLock Spire Point projectiles, these American Whitetail cartridges are a great combination of ballistics and modern components. Hornady American Whitetail 243win rounds use select propellants that provide consistent accuracy and performance. This optimized load is tailored specifically for deer hunting and has been a favorite for decades. The InterLock Ring, a Hornady exclusive, ensures that the hard-alloyed lead core and tapered jacket remain locked together during expansion. These quality centerfire rounds are brass-cased, boxer-primed, non-corrosive and re-loadable.