Thanks Dutchman, That helps. By the way, again answering my own question, the extractor in the Colt was enlarged when the 380 model came out and since the gun could easily be converted to 32 the barrel on both models was cut for the larger 380 extractor. However, this did not explain the difference in the barrels I have for the Swed. Both would seem to work and function but I have not yet fired the pistol in either caliber, or kaliber. As for the description of the caliber, I would note that this particular caliber, .380, goes under several different designations, and not all of the differences are metric. Just depends on what country you are in at the time I guess. (.380 Auto, .380 Short, 9mm Browning, 9mm Corto, 9mm Kurz or 9mm Short, and 9x17mm)