Softnose

Questions that have arisen regarding the "stopping power" of the modern small-caliber bullet, particularly in view of the reduction of the caliber of the rifle in some services to 0.25 inch, or even less, have led to propositions to adopt soft-nose or "mushrooming" bullets, which will be deformed on striking an animate object, inflict a more dangerous wound, and increase the shock over that given by a hard bullet of the same caliber and weight, which would penetrate the body without deformation. […] The soft-nose bullet is inferior in accuracy, and is especially inferior in its ability to penetrate hard substances used for defensive purposes, making it almost useless to reach troops under cover that would be dislodged by the service bullet.

Source: wiktionary

When I got the rifle I shot a coyote in a trap, to see what effect the soft nose bullet would have. He was struck back of shoulder, and a hole torn, where bullet entered, about 3½ inches in diameter.

Source: wiktionary

The soft nose bullet if it is fired and hitting any hard object, especially bone, it flattens and becomes distorted and is no longer round and has a tearing force with it.

Source: wiktionary

The softnose technique involved placing an inhibitor on a blaster, which allowed a laser to travel at slower speeds, actually penetrating the target. Initially developed for mining purposes, they were quickly adapted by some greedy weapons manufacturer.

Source: wiktionary