This is a interesting post started by myself. So an update is due. I did buy that 41 short colt mold at 160 grains. It works in my colt but not in my new to me late model Remington over/under. Also in the Remington, the cases that use a crimped blank, only fire in the bottom barrel of the Remington. The Remington has to have the top bearing of the 160 grain bullet trimmed back in order to chamber. Again, the crimped blank and 1 grain of trail boss works for me but I have not chronographed.