Are hollow points illegal? I heard that in NY for every hollow point you have in a gun you get one felony. A 357 loaded with hollows would be 6 felonies, because they are considered "cop killers". I also heard you can put 357 rounds into a 38. special. I've heard you can do the same with a 9, but can't remember what caliber. This seems like a bad idea that would cause the metal in the gun to change and melt, if not backfire altogether.