New technology doesn't always become popular quickly. I can imagine Hollow Point bullets for self defense and police work being this way. Does anyone know approximately when they were first available on the open market (or for LE use)? And how long it took for them to become common? The reason I ask is that the Lehigh Xtreme Defender series of copper solids looks like it may be the sort of new bullet technology that may become standard ammunition in the decades to come. Right now it's seen by many as a gimmick, and we don't have a whole lot of real world data on the effectiveness of the design. But it's clearly doing something that convention wisdom would have us believe just shouldn't work. I've heard it compared to a FMJ with a funky nose, but it clearly acts very differently than that in testing. We must also consider that if a wide flat meplat on a relatively fast moving big bore revolver bullet (whether hardcast lead or a mono solid) makes a much larger hole than the bullet diameter, there is something more going on. That the flesh compressed by the bullet is being forced from it's path laterally and created damage directly adjacent to the bullet's trajectory. So why can't a different design do something similar? Does it seem to anyone else, that bullets like the Lehigh XD may become the new norm?