The .45 Colt was the evolutionary product of the
transition period from cap & ball handguns to fixed cartridges. The 1860
Colt Army revolver had been converted to cartridges by several methods in order
to get around the Rollin White patents held by Smith & Wesson. When that
patent expired Colt came out with an interim cartridge gun based on the 1860
Army frame. It was made with a recoil plate, a loading gate, and had an ejector
rod on the barrel. They were made in both centerfire and rimfire and were called
the Model 1872.
The paper-thin chamber walls in the cylinders would not take much pressure.
The cartridge used a "heel" type bullet similar in design to the .22 rimfire
bullet. Called a "44 Colt", the actual bullet diameter was .452" - the same
diameter as the .45 Colt is today. The .44 Colt cartridge was shorter and
smaller than the later .45 Colt, measuring only 1.1" in length. It was loaded
with a fairly light charge of black powder and used a pointed bullet.
In 1873 Colt introduced the Single Action Army (known as the "Model P") along
with the .45 Colt cartridge. It was the military caliber for 17 years and
like most military calibers that worked well in combat, it became popular with
civilians. That is has remained a favorite so long after more "modern"
cartridges have been introduced is a testimony to its effectiveness. Now 125
years old it is still one of the best.
The original factory loads were pretty powerful. With an advertised bullet
weight of 250 gr. at a velocity of 910 fps, it created over 460 foot pounds of
muzzle energy. I once re-created those loadings using original REM-UMC
balloon-head cases and 40 gr. of Dupont 3Fg blackpowder. I used the Lyman bullet
#454190 which is a faithful reproduction of the original factory bullet except
it is not hollow-based like the originals were. In my 7 1/2" Ruger .45 these
loads averaged 962 fps and produced a muzzle energy of 532 ft. lbs.! No wimps by
In the 1980s some ammo companies tried to heat up the .45 a bit by going to a
light bullet at what used to be normal velocities for this cartridge. Their use
of a light bullet defeated the whole purpose of the .45 and my use of them has
been less than satisfactory. Most are advertised at 1000 fps or so but in actual
use do not exceed or sometimes even equal what you can get with a heavier
bullet and a full load of black powder. I shot some dogs and a few coyotes with
various loads and was never satisfied with the performance I got. On a coyote
some loads would not penetrate completely on a crossways shot. And a coyote is not
The so-called "Cowboy" loads today are fun to shoot, and many are supremely
accurate. But they are loaded too light to be used seriously. They are "game"
loads used for playing games, and should be treated as such. Personally I would
not use them for anything
By the way, I do appreciate those who shoot full-power blackpowder loads in
the "cowboy" matches. They have a handful. Using real loads is much more
realistic than using gallery loads, but as Mr. Keith said, "Every dog has
to scratch his own fleas" .. so those who play games are free to do
whatever is allowed by the rules of the game.
Introduced so many years ago, the .45 Colt still lives. It outlasted those
who tried to replace it. The light Smith & Wesson Schofield load has been re-introduced as a
"game" cartridge due to its low noise and light recoil. Until then it had been as dead as the man who designed it. Poor Major Schofield, depressed about the poor sales performance of his
design, used one to kill himself down at old Ft Bowie in the Arizona Territory. The Colt Single
Action and the .45 Colt ammo outlasted them all.