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Steel shot however has been known to scratch older barrels made from soft, relatively thin steel and to damage barrels with fixed chokes. There is certainly a question about some of the new pellet formulations, such as Federal’s tungsten-iron, which are designed to improve upon lead. Some of these products are harder than lead and are actually harder than the steel in the average shotgun barrel.

By minimizing contact between your steel barrel and the pellets in a load, the shotcup helps keep the accelerating pellets away from the hard barrel. The friction from such contact causes soft pellets to deform; it gives the otherwise relatively round pellets flat spots and these deformed pellets are pattern-wreckers, the so-called “flyers.” Thus, one function of a modern century wad or shotcup is to protect the pellets, and that is something a flat cardboard disk from the early 1900s could not do.

The Deci-Max is designed for extending 10-gauge versatility with lightweight shot charges and small shot sizes. It is pre-slit and recipes are available for this wad with lead, bismuth and Hevi-Shot.