Dumdum Bullets Bullets having their lead core left uncovered at the point (semi-jacketed bullet), or having an unjacketed, but cylindrically bored point (hollow-point bullet). Owing to their construction, the bullets have a somewhat reduced power of penetration. At a short distance, however, they produce large wounds that heal with difficulty. The bullets are named after the Indian town of Dum Dum, where a munitions factory first produced semi-jacketed bullets for the British forces in the 1890s. …