At one time in the past I had 45 caliber wax bullets which were to be used with the 45-70 cartridge. The load was wax bullet and a primer only. When shot they were quite accurate out to 4 or 5 yards and certainly I would not have wanted to be hit with one. (at 10 feet they would dent sheetrock) It was my understanding they were originally used by the military in the trapdoors for indoor rifle training.

Wish I had some today as it is a bit on the cool side here in Minnesota and I don't care to go outside.