Which outcome arises during prolonged, repeated firing of early cast iron hand cannons?

💡 Explanation

Bore erosion increases with repeated firing cycles causing progressive bore growth via thermal shock and fatigue. Micro-crack expansion via thermal fatigue exceeds material limits, therefore the barrel expands, rather than achieving increased velocity or corrosion resistance under repeated stress.

• Which consequence arises when heavy Roman supply wagons repeatedly traversed roads on unstable ground?
• Which limitation arose when medieval Islamic astronomers empirically adjusted astrolabe scales to refine celestial measurements?
• Which outcome accelerates soil degradation during the Medieval period due to intensive agricultural expansion?
• Which risk significantly increased when Roman road construction switched from local materials to deeper gravel foundations?
• Which optical consequence resulted from medieval Islamic scholars grinding spherical lens surfaces for astronomical instruments?
• Which outcome regularly occurred in pre-Columbian chinampa agriculture when insufficient dredging was performed around the raised beds?