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SR 7625 and the 45 ACP
 Moderated by: Slingshot, OldStuffer, klallen
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 Posted: Sat Jan 26th, 2013 11:28 PM
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Malazan
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I have a question, I notice Hodgdons Reload Data for IMR SR 7625 is as follows

For 230gr FMJ


COAL 1.200


Min- 5.4 12,2000psi
Max- 6.0 16,600psi



If I'm loading my COAL at 1.260 can I increase the load over the Hodgdons MAX?

Thank you



 Posted: Sat Jan 26th, 2013 11:52 PM
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OldStuffer
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Well, you MIGHT, I sure wouldn't increase it MUCH, and, all you will be doing is making up pressure loss for the extra length, which means velocity will remain similar, not increase much, if any.

Notice this, tghe max. pressure of .45 Auto is 3,000psi higher than the max load there.
It is fully likely that any more than 6.0gr, or 16,000-ish psi was not a good stable pressure.
Say, maybe 6.2gr may have generated 17,500psi BUT it may have been very unstable, wavering from 17,000 to 20,000 shot to shot, adn so 6.0grains may be SUITABLE, more than 6.0gr of 7625 may just be UNSUITABLE for more velocity, and/or pressure, in that loading.



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 Posted: Sun Jan 27th, 2013 11:00 AM
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Pete D.
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^^^what he said.
I have used SR 7625 for both shot shells and for .45 ACP loads. I like it. It meters well and, in shot shells, allows for lower pressures when I am making up shells for my old Parker.
I have kept my .45 loads - target loads with 200 gr. LSWCs - down at the minimums. Shoot just fine.
Pete



 Posted: Wed Jun 10th, 2015 05:33 PM
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DaveMon_South
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I use 5.7 grains of sr-7625.....works awesome. Why would you want to exceed MAX? For 30 more fps? I love my expert commander too much for that...



 Posted: Thu Jun 11th, 2015 01:32 AM
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SansSouci
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I am no longer amazed at powders that can be used in the .45 ACP. It has to be the most versatile -powder wise- cartridge going.

AT one time, Bullseye was THE .45 ACP powder. Now I wouldn't be surprised to learn that talcum powder works.



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 Posted: Thu Jun 11th, 2015 06:01 AM
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pastime
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I know this is an old thread revived but it may help someone sometime so here goes. DaveMon_South, do you know what kind of velocities you were getting at 5.7gr of 7625? I was getting around 764 fps at that charge weight. I was using IMR published data (pre Hodgdon) and got the best results at 6.0gr.  The max charge weight according to this IMR data was 6.2gr at 825 fps, 17700(cup) and 5.8gr at 775 fps, 13600(cup). I use 7625 regularly for 45 auto and it performs well. I also worked up a load using 4756 and it performs well also.

These are my results with my firearm. Your results may very. Use at your own risk. Be Safe

Last edited on Thu Jun 11th, 2015 06:09 AM by pastime



 Posted: Fri Jun 12th, 2015 11:22 PM
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SansSouci
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pastime,

This source might help you:

http://www.realguns.com/loads/45auto.htm

I like this site because it lists accuracy, which is a good reference for me. While I haven't tried handgun loads listed here because they appear to be too close to maximum, I have tried his rifle loads with good results. Again, I look at accuracy first since I can't put a tag on what I can't hit, then I'll look at powder charge maximum and start a few grains below and work up while keeping a keen eye on group size.

I hope this site is useful for you.



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 Posted: Sat Jun 13th, 2015 02:13 AM
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pastime
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Thanks for the link SansSouci.



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