This bullet was designed, primarily, for 45-caliber lever action rifles. The front groove can be used for a crimp groove and doing so would give the proper overall length for the current Marlin and Winchester rifles chambered in 45-70 or 450 Marlin. The bullet will open at 1200 fps and withstand impact velocities that are far beyond any velocity that can be generated by any current 45-caliber lever gun.

This bullet will work on deer size game but I am the last person that will tell you that you need this high tech of a bullet for deer.

The bullet was primarily designed for large bore, elk, moose, and big bear, in defensive situations. It was found to out penetrate all of the 400grain expanding bullets (even other bonded bullets) that are generally used for these situations, when loaded to the max velocities from the 45-70 cartridge.