Talk:Colt Model 1903/1908

There was a tv movie from 1972 called Hardcase that starred Clint Walker, Stephanie Powers and former football player Alex Karras that had a Colt M1908 Hammerless in it. I haven't seen this movie since shortly after it was first shown, but I do remember a Mexican officer admiring the gun that Walker was carrying. The plot was that Walker had gone off to the Spanish War in 1898 and was a prisoner of the Filipino (perhaps Moros) guerrillas during the "Insurrection" that followed the war. His wife, Powers, thinks he's dead or gives up waiting, gets involved with a Mexican revolutionary (which shows how long he's been away, I believe that revolution started in 1910 or 1911), sells his ranch and gives the money to the revolutionary. He comes looking for her and his money. I'm pretty sure it was the M1908 because the officer admiring the gun mentions how impressed he is with ".38 caliber, and recoil action in a pistol" as I think he phrased it. Then again, maybe it would have been 1903 Hammer model, memory after all those years is a funny thing. Here's a link for it: http://www.imdb.com/title/tt0067182/

What ever happened with the 9x20mm round? How effective was it and why did it die out?