Back around 1973 my friend and I used to go shooting in an old junkyard one county east of where I lived. We conducted an experiment with my 6 1/2 " Model 29 shooting various types of ammo into a discarded underground gas station gas tank which had very thick steel sides. Shooting into the flat end portion of the tank, from about 25 feet, we fired Remington, Norma, Winchester and Super Vel ammo into the tank. All of the ammo put a small dent and stopped at that falling to the ground upon impact. The Super Vel ammo went right through the steel leaving an almost perfect hole that appeared to have been made by a drill. I became an instant believer in that ammo. I still have a few boxes of the original Juras Super Vel left. That was great ammo, way ahead of it's time.