This review tests CCI's Big 4 9mm shotshells, noting their #4 shot size and 1000 fps velocity, intended for pest control. While demonstrating effective energy transfer on soft targets like soda bottles, the ammunition failed to reliably cycle a Smith & Wesson M&P 9 Compact. Pattern tests showed a surprisingly tight spread at 10 feet (around 5 inches), but significantly wider at 15 feet.
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