How to pronounce“dumdum”in English

“From all accounts it was one of the fiercest fights of the campaign, conducted with great determination and conspicuous bravery. The fact that the rebel leader was an ex-Major on the Permanent Force Staff probably had not a little to do with the serious nature of the fighting, for the Loyalists were furious with him for his treachery. He also knew the seriousness of the position, and fought accordingly; though whether that justified him in permitting his men to use dum-dum bullets is a matter that only a traitor's conscience can decide. The wounds inflicted upon the Government men were frightful; practically every man on the Government side who was killed had been shot with dum-dums. Perhaps the sight of some of their comrades so mutilated had not a little to do with the heavy death-roll on the rebel side. "They shot us with soft-nosed bullets as one would shoot vermin," said one of those who took part. "And had we seen what was awaiting us after the charge there would have been no prisoners!"”