In 1875, Colt introduced the .32 Colt short and long cartridges chambered in their New Line Revolvers. No other American maker chambered it, but it was used in Great Britain, known as the .320 revolver. For some reason, Colt used a .30 caliber bullet that measured .300 instead of the typical .311-.312 used by other makers of .32 revolvers. A heeled bullet was also used to some extent but wasn’t popular. Accuracy was not very good though, and was only adequate for close range. Most loads shot an 80 grain bullet in the 750 FPS range, giving around 100 FT LBS. of energy,