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Reloading the .45 Colt

by Steve Gash   |  December 4th, 2011 9

These six projectiles are a good cross-section of what’s available for the .45 Colt: (from left) Cast 200-gr. RN; Cast 244-gr. WC; Hornady 250-gr. XTP; Cast 250-gr. RNFP; Cast 255-gr. SWC; and Hornady 225-gr. FTX.


In 1873, the U.S. Army adopted a new service handgun and cartridge. The gun? The legendary Colt Single Action Army. The cartridge? The equally iconic .45 Colt. The round was originally loaded with a 255-grain lead bullet over 40 grains of FFg black powder for a velocity of about 900 fps (out of the issue SAA’s 7½-inch barrel). It was a formidable cartridge, used on good guys, bad guys and innumerable game, large and small. It is immensely popular to this day, and justifiably so.

Much to the irritation of cartridge buffs, the .45 Colt is often incorrectly referred to as the “.45 Long Colt,” and many guns, cartridge boxes and cases have been so labeled. But this was never an official designation for the round. The term was meant to differentiate it from the shorter (and newer) .45 Smith & Wesson (aka the .45 Schofield). Our test gun this month is Beretta’s single-action Stampede, made by Uberti in Serezzo, Italy. For reloading, I used the RCBS carbide dies I’ve had for decades, and they worked to perfection. The .45 Colt offers a wealth of versatility to the reloader. Replica revolvers as well as vintage arms are not particularly strong, so pressures of loads for them must be kept within the SAAMI maximum limit of 14,000 psi. All of the loads shown here are within this maximum and should be safe in any .45 Colt SA in serviceable condition, especially the modern-day clones. The loading manuals have separate listings of load data for the much stronger Ruger revolvers, but amped-up loadings must not be used in Colt originals or replicas.

It is also possible to get two, or even three charges into the .45 Colt’s cavernous case. A solution to this dilemma is to use IMR’s new Trail Boss low-density powder. An appropriate charge of Trail Boss occupies a lot of the case volume, and while it makes an overload less likely, the reloader must still remain vigilant. Many traditional powders are also suitable, and we have included a representative cross-section of them.

The mainstay of the .45 Colt is, of course, cast bullets. While the lighter 200-grainers are just fine for plinking loads, the classic 250- to 255-grain roundnose flatpoints or semi-wadcutters at 750 to 850 fps mimic original loads and offer plenty of power and accuracy. Loads that are close to the original weight and velocity tend to hit closer to point of aim than lightweight bullets at higher velocities.

Modest charges of the fast-burning W-231 and TiteGroup did great with the 200-grain RN bullets. At velocities of 825 to 900 fps they punched small groups, and recoil was light.

The 244-grain WC bullets were made by my friend, the late Joel Penny, out of pure linotype. They are hard as a rock, but do not lead, and they shoot great at about any velocity. Contemporary firms offer similar designs. The representative combination shown uses 6.2 grains of TiteGroup for 917 fps.

Several great loads were developed with the traditional 250- and 255-grain lead bullets. It’s hard to find a bad load with such bullets, but they favored True Blue, AA-5, and Vihtavuori N-350, to name a few. I must confess, however, that I long ago settled on the BBC 250-grain RNFP with 11.5 grains of Vihtavuori 3N37 as my standard .45 Colt load. Velocity is almost exactly 1,000 fps, and accuracy is top drawer.

While most jacketed hollow- and softpoints need about 800 fps for expansion, at lower velocities these heavyweights are still formidable. They function like a hardcast bullet, i.e., they don’t expand, but penetrate like the dickens.

Hornady’s new 225-grain FTX bullet was developed for the many .45 Colt lever-action rifles with tubular magazines, but it lends itself nicely to revolvers with increased velocities and flatter trajectories. Velocities over 900 fps were obtained with HS-6, True Blue and Longshot. Check out the new Hornady Manual 8th Edition for additional loads.

A minor modification in loading technique is required for the FTX bullet. Overall maximum cartridge length for the .45 Colt is 1.600 inches, but the FTX bullet has a long ogive, so cases have to be shortened to 1.215 inches to stay within this length. Trimming can be easily accomplished with a manual case trimmer, but being basically lazy, I used Hornady’s new Lock-N-Load power case trimmer to whittle cases down to size.

You may or may not be able to securely roll-crimp the FTX bullet in these shortened cases with your regular seating die, but not to worry. The Hornady Series II .45-caliber seating die (part no. 044151) works great for the FTX loads, as does the Lee Carbide Factory Crimp die (part no. 90865). Loads with all bullets except the FTX were crimped with the Lee die. A good bullet pull is essential for uniform ballistics, and a firm crimp is a big help.

The excellent Speer 225-grain JHP did well with 7.5 grains of old standby W-231 at 826 fps. Sierra’s 240-grain JHC favored 7.0 grains of Red Dot. The Hornady 250-grain XTP is a great all-around game bullet, and typically shows fine accuracy. Here Alliant’s Power Pistol was a standout. With 8.5 grains, velocity was 877 fps. HS-6 and W-231 were also quite accurate.

Interestingly, all of these loads, regardless of varying bullets weights, hit pretty much the same as to elevation (but still left of the point of aim). Varying the velocity up or down can also adjust for elevation, too.

It is silent testament to the grand, old .45 Colt that virtually every ammo manufacturer extant produces a variety of loads for it, and a fine cadre of revolvers—replica, as well as modern—is readily available.

Witness also the fact that the .45 Colt enjoys enormous popularity with reloaders. RCBS reports that in 2006, they sold more dies in .45 Colt than in .25-06, 9mm, .30-30, 8×57, .222 and the list goes on. So fans of the original frontier manstopper need not fear its demise anytime soon.


  • P B McGeough

    I have a Rossi Ranch hand in 45Colt and enjoy shooting it. In Canada it is not a restricted weapon and is not treated as a Handgun. The sites are a bit of a challenge as it shots high even with a six o'clock hold. I have to hold
    below the black to get it in the black regardless of using the Hornady 225gr FXT or the Winchester lead
    255gr load or the Federal 225 JSP.The Buckhorn site is set as low as it will go.( not low enough)
    In contrast, my Chiappa 357 magnum SS carbine M92 replica shoots all loads well and feeds SWC 158 lead 38 specials all day long like a champion. I may have to grab a ruger in 45 colt as I enjoy shooting that cartridge and could do so all day long. Very pleasant for a big bore, thanks for the info and keep up the good work!!

  • James Doud

    Nice article, I appreciate the insight into the various bullet types. I plan on making the .45 colt my first venture into reloading.

  • Joanie

    I own a .357 Magnum revolver, while it is not the most powerful hand gun in the world anymore, I still believe it to be the most practical of all handguns.

    That being said I also own a Uberti .45 Colt SSA 5 1/2 inch barrel, and I plan on using it to hunt some as I can hit better with it at 30 yards than I can my .357 Mag. I like to load 255 gr Lead flat noses, over 37 gr of Pyrodex P it gives a stout 902 fps and I think will take care of most critters.

    I know their are a lot of magnum heads out there and I am not downing the big magnums, and Ruger only loaders, but don’t forget that this old classic the .45 Colt has been downing everything from jack rabbits to bears for over 130 years in its classic loading. While the muzzle energy is not nearly as great as the magnums, and Ruger loads , it is a heck of a penetrating bullet in its classic loads and can shoot through most anything.

    So anyway that is my take on this classic gun, and caliber , God bless enjoy shooting !

  • Terry Kremin

    love trailboss for these lighter loads. And you didn’t even broach the topic of “Blackhawk” only +p loads! make excellent hunting loads, especially if you have an 1895!

  • John Ferguson

    Although I would like to believe it was purely due to nostalgia, I believe that the real reason reloading of colt 45 rounds is so popular is the simple fact that their cost is from 75 cents and up per round now to buy brand new.

  • Bigreb

    I need help… I am loading the .45 Colt using Winchester 231 pushing a 200 Grain SWC and Winchester brass… I am using the RCBS Carbide dies… Here is my problem… I have removed the sizer die and installed the expander die… I insert a case into the case holder and move it into the die… Instead of “flaring the neck ” so I can insert the bullet I am crushing the cartridge in the die… The crushing creates a bulge in the case about 1/4″ or so from the top (see attached picture)… It almost appear the inside diameter of the case is too small for the expander to fit inside the case… Any suggestions…

    • Hitman

      Hay your die is set wrong, screw seater stem out of die. Put shell holder on shaft bring shaft all way up, screw die down until it touches back die off 3/4 turn lock nut. put casing in then screw stem in until it touches back shaft off screw stem down half turn at a time keep bringing up shaft untill you get your desired flare. I do hundred’s of these 45.’s. Perfect die set. Peace

  • Larry

    I am reloading 45 colts to shoot in a Henry Rifle and would like to know the over all length of the bullet to work in a rifle. I am reloading 185gr. Hornady xtp bullets. The books say 1.5995, but the looks to be seated to far down in te case.

    • Bob Ralph

      did you get a anwer

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