The Lee 300 AAC Blackout Breech Lock 3-Die Set is designed to deliver precision, convenience and consistent results for reloaders. This comprehensive set includes color-coded Smart Lock bushings, making die identification quick and effortless. The Full-Length Sizing Die ensures reliable resizing of your brass, while the Easy Adjust Dead Length Bullet Seating Die allows for precise bullet seating every time. For a perfect finish, the Factory Crimp Die provides a secure and professional-level crimp, ensuring that your reloads perform at their best. The set also includes a Universal Shell Holder, Powder Dipper and clear Instructions/Load Data to guide you through each step of the reloading process. Ideal for those reloading mixed range brass and utilizing a Breech Lock Quick Change feature on their reloading press, this die set is an essential addition to any reloader's toolkit.