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Subject Topic: SR 4756 and 45 acp? Post ReplyPost New Topic
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Rockman
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Posted: December 09 2008 at 1:02pm | IP Logged Quote Rockman

Any of you fine gentlemen used sr 4756 in 45 acp?In a Smith Model 25? If so how did you like it and what weight bullets seemed to work best with it? Paul are you out there?
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Paul5388
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Posted: December 09 2008 at 2:30pm | IP Logged Quote Paul5388

Milton,

I probably have loaded a few .45 ACPs with 4756. 7.0 gr with a 230 gr Golden Saber produces 857 fps MV. The same load with a 255 gr Oregon Trails produces 890 fps (probably that high due to deep seating).

By using 10.0 gr, things begin to warm up with the 230 gr GS, producing 1050 fps.

I've had them faster, but I'll leave those out.

Remember, I used a M625-4 on these heavier loads and it's capable of using .45 Super loads in a standard chamber and .460 Rowland loads with a chamber reaming.

The 7.0 gr load with a Lyman 452424 may be about ideal in a revolver and may even function in a 1911, without beating it to death.

This Speer #8 data may give you some guidance, but remember, 4756 can be easily loaded to less than maximum levels.

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Rockman
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Posted: December 09 2008 at 3:07pm | IP Logged Quote Rockman

Thank you very much ! I finally got around to buying some 4756 and was amazed how clean,efficient and powerful it was loaded in 38 special.I stayed on the light side of "The Load" but was amazed that I got no leading with Hornady swaged 158 grain bullets.Then the thought came to me,"why not ask on the Forum about using it in a 45?".
Now if I can just find some good loads for a 32 H&R mag !??
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Paul5388
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Posted: December 09 2008 at 5:33pm | IP Logged Quote Paul5388

Well, you struck out that time. I don't own anything smaller than a 9mm (the .25 Auto doesn't count).
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Slydog
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Posted: December 09 2008 at 10:13pm | IP Logged Quote Slydog

I noticed from your Speer #8 that those loads are for the .45 auto rim. Are loads interchangible between the auto rim, and ACP? I ask because I was looking through my NEW LYMANS :D, and cross referencing my Speers, to come up with a starting load for some Rainier 185 gr plated flat nose bullets, using Winchester Primers and Alliant Power Pistol.

So far with all the loads I've come up with for the various bullets I have, 7.2 gr of Power Pistol seems to be an acceptable median load to start with. While I didn't specifically find any loads showing Power Pistol with a 185 gr LFN in .45 ACP, I believe I did see one listed under the .45 Auto Rim. Thus my question about interchanging the two. (I hope I'm not hijacking your thread here! Just wanted to query and point out the difference also if it matters.)


Edited by Slydog on December 09 2008 at 10:17pm


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Paul5388
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Posted: December 09 2008 at 10:26pm | IP Logged Quote Paul5388

The .45 ACP and the .45 AR are the same cases internally. The only real difference (on modern cases) is the added rim to make a moon clip unnecessary to use.

Some older cases were what is called "balloon head" and aren't as strong as the modern solid head cases.
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Slydog
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Posted: December 09 2008 at 10:34pm | IP Logged Quote Slydog

So they are interchangeable! :) Thanks again. You guys are genius!

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STCM(SW)
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Posted: December 09 2008 at 11:04pm | IP Logged Quote STCM(SW)

There is some dfferences as you can see below:





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Slydog
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Posted: December 10 2008 at 10:31am | IP Logged Quote Slydog

....so there ain't no "magic bullet".
Still..gives me someplace else to cross check between propellants I guess.
Thanks again!

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STCM(SW)
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Posted: December 10 2008 at 7:44pm | IP Logged Quote STCM(SW)

Well, anything is better then nothing....

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Slydog
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Posted: December 10 2008 at 9:42pm | IP Logged Quote Slydog

Cant argue with that! Thanks Bud!

Kenny

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Posted: December 11 2008 at 9:46am | IP Logged Quote wheezengeezer

the only difference between the 2 is; you can use a heavy roll crimp on the AR and the SAAMI max is less for the AR.

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Paul5388
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Posted: December 11 2008 at 9:21pm | IP Logged Quote Paul5388

The only difference in my die sets is the shell holder.

The AR doesn't need a heavy roll crimp any more than an ACP does, in my experience.

A modern revolver will handle as much, or more, pressure as the ACP does. Modern does not mean a M1917 or even a Brazilian 1937.
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STCM(SW)
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Posted: December 11 2008 at 10:01pm | IP Logged Quote STCM(SW)

I have shot hotter loads out of a AR then any I would try in a auto...

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lovesrugers
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Posted: December 12 2008 at 9:16am | IP Logged Quote lovesrugers

STCM(SW) wrote:
I have shot hotter loads out of a AR then any I would try in a auto...

In the end the brass doesn't make that much of a difference, it comes down to the strength of the gun that holds the brass. If the gun fails than it usually doesn't matter how strong your brass is it will fail to.

As to hot 45 Auto rounds, I have been working some up for an article I am writing about Ruger only 45 Auto loads. So far I have hit near 1,400 fps with a 200 grain bullet and close to 1,200 fps with a 230 grain bullet. Both of these loads are out of standard 45 Auto brass. No the brass does not show any of the traditional high pressure signs.

Here is a picture of the fired cartridge casings still in the Blackhawk. This was the 200 grain bullet at around 1,400 fps. Pressure is approximately 34,000 psi or so.      


One of these days I am really going to have to finish the article and get it posted for those that are interested. I think all it really needs at this time is a final edit.

Jerry
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Rockman
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Posted: December 12 2008 at 10:52am | IP Logged Quote Rockman

lovesrugers:I for one would like to see that article when you finish.Where could I find this and when?
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Paul5388
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Posted: December 12 2008 at 11:49am | IP Logged Quote Paul5388

Milton,

Jerry will probably post it in the "Articles" on the home page for Handloads. At least, that's where he has posted them in the past.

Jerry,

If you want me to edit, I'd be more than happy to do it, but it would have to wait until after #1 granddaughter's wedding with Gallatin Gunner tomorrow.
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Posted: December 12 2008 at 1:34pm | IP Logged Quote Slydog

I'm looking forward to your article as well.

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STCM(SW)
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Posted: December 12 2008 at 5:02pm | IP Logged Quote STCM(SW)

Slydog wrote:
I'm looking forward to your article as well.


Me too....

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lovesrugers
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Posted: December 12 2008 at 6:48pm | IP Logged Quote lovesrugers

Well it is almost finished. I went through it a little today before all the parties I had to attend. I am mostly happy with it, but I think some parts still don't flow right and I am still deciding if I want to leave the entire first part in or not.

Jerry
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