.41 Long Colt
The .41 Long Colt / 9.8x28mmR cartridge was created in 1877 for Colt's double-action "Thunderer" revolver. == History and description == The .41 Long Colt was a lengthened version of the earlier centerfire .41 Short Colt, which was made to duplicate the dimensions of the even earlier .41 Short rimfire.