No amount of extra gunpowder can fit in that round to produce that effect. not enough gunpowder can though (squib) its probably a sabotaged bullet. Underloaded bullets cause MORE explosive events like shown ,than overloaded. Putting in as much gunpowder as you want wont increase the explosive force so much that the bullet wont properly exit the jacket and enter barrel multiple videos of UNDERLOADED gun mishaps: Here are many videos of big time explosions from NOT ENOUGH gunpowder (probably) : https://www.outdoorhub.com/stories/2015/01/22/9-catastrophic-gun-malfunctions-can-learn/ SABOTAGED BULLETS enter resale markets. USA dropped thousands of explosive tamperred .50 cal across middle east in recent decades, and even in vietnam the USA sabotaged bullets. : https://militaryhistorynow.com/2016/11/18/project-eldest-son-the-secret-u-s-scheme-to-sabotage-charlies-ammo/ Why? to cause fear and terror at using seized found bullets **Know Where Your Ammo Comes From! Project Pole Bean: How Sneaky Green Berets Blew Up a Few Guns and Frightened an Entire Army**: https://www.gunsamerica.com/digest/project-pole-bean-how-sneaky-green-berets-blew-up-a-few-guns-and-frightened-an-entire-army/ EARLIER : > British slipped **exploding rifle cartridges** into enemy caches during the Second Matabele War (1896-1897) in what is now Zimbabwe. The British scouts were led by an American, Frederick Russell Burnham, who probably put them up to it. That article claims only large caliber (.50) and mortars are typically sabotaged, to minimize maiming farmers.