  | Where is my pressure coming from? |
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09-27-2012, 09:42 AM
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Gold Member
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Join Date: Oct 2008
Location: Spokane, Wa.
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Re: Where is my pressure coming from?
Mike, take this for what you want but quickload shows your 96.5gr load as over 76,000 PSI if your COAL is 3.600 if you COAL is a bit longer say 3.750 it's still pretty hot load at 70,000 PSI. Max PSI is shown at just a little over 63,000.
Have you ever thought of using a little slower powder like H4831sc? QL shows H4831sc giving within 75 fps of your H4350 load but with less pressure.
Sounds like everything your doing is right but your load is just a little on the hot side. Hope this helps.
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09-27-2012, 09:56 AM
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Platinum Member
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Join Date: Dec 2009
Location: Basin Wyoming
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Re: Where is my pressure coming from?
Quote:
Originally Posted by B23
Mike, take this for what you want but quickload shows your 96.5gr load as over 76,000 PSI if your COAL is 3.600 if you COAL is a bit longer say 3.750 it's still pretty hot load at 70,000 PSI. Max PSI is shown at just a little over 63,000.
Have you ever thought of using a little slower powder like H4831sc? QL shows H4831sc giving within 75 fps of your H4350 load but with less pressure.
Sounds like everything your doing is right but your load is just a little on the hot side. Hope this helps.
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B23, my oal is 3.8, and I am considering just starting over with a new powder. I think I will probably try something like H4831sc. But I would first like to figure out what the heck is going on with this load. It is possible I suppose that the change in weather and humidity is to explain for the changes in pressure signs. I know its a very hot load. Thanks for running the number for me!
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Mike
Anything less than overkill is underachievement!
" Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad
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09-27-2012, 09:58 AM
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Join Date: Sep 2002
Location: Illinois
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Re: Where is my pressure coming from?
See it's already been suggested.
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09-27-2012, 10:03 AM
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Join Date: Feb 2007
Location: Townsend, Montana.
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Re: Where is my pressure coming from?
I agree that H4350 is a little fast for the case. I too would change powder. I am guessing the suspected rise in pressure is from case expansion durring previous firings and your case is now fitting the chamber tighter even though you are full sizing.
Jeff
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09-27-2012, 10:10 AM
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Join Date: Oct 2008
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Re: Where is my pressure coming from?
Playing with QL, RL22 and 7828ssc look like they both would get you about the same FPS but with less pressure.
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09-27-2012, 10:13 AM
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Re: Where is my pressure coming from?
B23 how dense are the powder charges?
__________________
Mike
Anything less than overkill is underachievement!
" Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad
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09-27-2012, 10:25 AM
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Join Date: Oct 2008
Location: Spokane, Wa.
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Re: Where is my pressure coming from?
W/RL22 103.5gr is 105% fill capacity and show 64,000 PSI
W/7828ssc 103.5gr is 103.8% fill capacity and also 64,00 PSI
Your H4350 load of 96.5 and 3.80COAL was shown as 101.6% and 68,000 PSI
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