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I'm no physics expert, but I have my doubts about their claim of lower recoil due to slower burning powder. It will still require the same force to propel the bullet down the barrel. If it is too slow burning, it will be more like a flintlock, in that there is a delay between firing pin strike, and combustion. Which will not reduce the felt recoil, but slow down follow up shots. If I wanted heavier bullets, at lower speeds, I would switch from 9mm to 45 acp. I can't see this as much more than a very expensive gimmick. JMHO