While they weren't fighting comanche at the alamo, but lined up mesicans, I think the walker would have done a bang up job.
The Colt Walker holds a powder charge of 60 grains in each chamber, more than twice what a typical black powder revolver holds.
Medical officer John "Rip" Ford took a special interest in the Walkers when they arrived at Veracruz. He obtained two examples for himself and is the primary source for information about their performance during the war and afterward. His observation that the revolver would carry as far and strike with the same or greater force than the .54 caliber Mississippi Rifle seems to have been based on a single observation of a Mexican soldier hit at a distance of well over one hundred yards. The Walker, unlike most succeeding martial pistols and revolvers, was a practical weapon out to about 100 yards.
