If all the bullet problems encountered by shooters were tallied, core-jacket separations and jacket concentricity would score right at the top. Speers patented Hot-Cor process fuses the bullet jacket to the core. As a result, the core of a Speer Hot-Cor bullet will not slip on impact. Unlike some bullets, which are manufactured simply by forcing a cold, sometimes lubricated slug into a jacket. Speer fills the copper jacket with 825F molten lead, creating a fused bond that is nearly impossible to separate. UNI-COR also enables the manufacturer of a jacket with incredible uniformity resulting in far superior accuracy.

Speer first used UNI-COR technology to produce the worlds finest fully-jacketed bullets - our Totally Metal Jacketed, or TMJ. Unlike most FMJ bullets, the TMJs have no lead exposed at the base. Theres no lip of jacket, like other bullets, that can be deformed by powder gasses and destroy accuracy. Shooting a competition pistol with a ported compensator? TMJ wont foul ports like conventional FMJs - our integral base is all copper.

Speer has been building jacketed handgun bullets since the early 1960s, long before most of the competition, so innovation is nothing new to us. UNI-COR is yet another tool for building better bullets the Speer way.