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Old 07-05-2018, 10:58 PM
342ti 342ti is offline
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Default 45 Colt Bullseye Loads

Going to start reloading for 45 Colt as soon as my 25-5 shows up next week. It has the good throats/.452-.453, 4bbl. I have 8-10 lbs Bullseye on hand, so Im looking for some good range loads, accurate and light. Am open to bullet weights, was looking towards 250/255gr SWC. Also, has anyone heard of having problems with sight adjustment and light loads ratio, on the 25-5? Previous owner was saying he ran out of elevation adjustment, until he stepped up his loads around the 850-900fps mark? I never heard of anything like that, but never owned a 45 Colt either. Thanks.
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Old 07-05-2018, 11:53 PM
rockquarry rockquarry is online now
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I've been shooting various .45 Colt revolvers, rifles, and a carbine for more than forty years, mostly with the Lyman #454424, about 255- 260 grs. I thought I had tried Bullseye at one time, but cannot find it listed in my notes.

That's a huge case for such a fast powder, though it may work fine. However, I'd attempt to locate published data from a reputable source before I would rely on Internet suggestions. Check the Alliant paper manual (or perhaps the website) and the Speer book. Speer often uses powders other manuals neglect. There are likely other sources.

I don't shoot .45 Colt much anymore. I used Unique for many years but found HS-6 to be a slightly better .45 Colt powder. As for elevation adjustment, my two 25-5s, a 4" and 6", always shot high (about 3"-4" at 25 yards with the elevation adjustment all the way down. This was with muzzle velocities of around 800 fps with the 4" and 850 fps with the 6". A higher velocity will correct the problem, but with noticeably increased recoil.

I doubt you'll be able to get 900 fps with a heavy bullet using Bullseye powder and stay within standard pressure parameters, but that's only a guess on my part. People load these guns hot, but I wouldn't do it.
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Old 07-06-2018, 12:06 AM
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DWalt DWalt is offline
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For many years, my only .45 Colt load is 6.5 grains of Bullseye and a 200 grain flat nose lead (Cowboy) bullet. Good accuracy and about 900 fps MV.
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Old 07-06-2018, 09:16 AM
cowboy4evr cowboy4evr is offline
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Going from 5.0-7.0 grs in .5 increments you should find the load that you are looking for . 6.0-6.5 seems to be what many have used in the past .
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Old 07-06-2018, 09:47 AM
Forrest r Forrest r is offline
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Quote:
Originally Posted by 342ti View Post
Previous owner was saying he ran out of elevation adjustment, until he stepped up his loads around the 850-900fps mark? I never heard of anything like that, but never owned a 45 Colt either. Thanks.
????Odd

Slower bullet tend to print higher, ='s lowering the rear sight.
Heavier bullets tend to print higher, ='s lowering the rear sight.

A chart showing the correct rear sight height.


A formula to use to figure out your sight height/lowering adjustments.

Example:
I do a test load with a revolver and it's hitting 6" high @ 25yds.
9" x (6"/300)

9" is the distance between the front and rear sight
6" is how high (could be low/left/right also) the load is hitting
300 is how many inches the load was tested @ 25yds ='s 300"

6" divided by 300" ='s .02" or 2/100th's of an inch

9" x .02" ='s .18" or 18/100th's of an inch

If I want that load that's hitting 6" high to hit the poa. I have to lower the rear sight .18" (18/100th's of an inch).
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Old 07-06-2018, 10:31 AM
JD Mahan JD Mahan is offline
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But there's 900 inches in 25yds.

25yds * 3 = 75ft

75ft * 12 = 900 inches
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Old 07-06-2018, 11:20 AM
cowboy4evr cowboy4evr is offline
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The only time I ever ran out of sight adjustment was with a 25-10 , 6" barrel . Using 255 gr cast bullets with the rear sight all the way down wasn't enough . I had to have a higher front sight installed . There was a rumor that those particular 45's had been sighted to shoot 185 gr . My 25-5 has no problem with 255gr bullets to 300 gr for sight adjustment . I have shot loads from " mild to wild " . Maybe , someone in the past changed out the front sight to a lower one . Buying used guns can be a challenge as we don't always know what was done in the past . Hope this helps , Paul
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Old 07-06-2018, 11:40 AM
ameridaddy ameridaddy is offline
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My 25-5 shot ~6" high with a 255 gr bullet @ ~800 fps. Looking closely, it appeared to me Smith used the same one piece barrel and sight that they used for the Model 29, just a different bore. Registered for the 29, shooting a lighter bullet much faster than Colt 45, it would leave the 25 shooting high. It was too high even for 6 o'clock hold on a 25 yd target.
I had to mill off the front sight blade and install a .043" taller one to hit point of aim and leave some room for both up and down elevation adjustment at the rear sight.

Last edited by ameridaddy; 07-06-2018 at 11:53 AM.
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