Which risk increases in early Chinese cast iron cannons that arises from inconsistent gunpowder mixing?

💡 Explanation

Localized barrel wall overpressure is a result of inconsistent gunpowder; the deflagration rate mechanism creates rapid, uneven gas expansion that exceeds the cast iron's tensile strength, because pockets of higher explosive concentration detonate more violently, therefore generating stress concentrations, rather than uniform pressure.

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