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EQUIPMENT & METHODS >> Ammunition & Reloading

jeh7mmmag
Pro Tracker

Reged: 11/01/04
Posts: 1926
Loc: Colleyville, DFW, TX

Re: Making reduced loads
05/12/08 08:55 PM

Matt,
I sure hope you are getting these loads from a reputable source?

Quote:

……130 gr partitions over 27 grains H4895……

Below data is from Hodgdon Load data site. Going below minimum or going above the max can be very dangerous.
Minimum starting load is 42.0 grs
130 GR. HDY SP Hodgdon H4895 .277" 3.180" 42.0 2782 44,700 CUP 45.0 2922 51,000 CUP

IMR 43.0 MIN
130 GR. HDY SP IMR IMR 4895 .277" 3.180" 43.0 2768 43,000 CUP 46.9 2957 50,600 CUP

It appears You are treading in dangerous territory (Secondary Explosion Effect) by disregarding powder manufacture advice for starting and Max loads. Your results could end up like this picture and with serious injury or worse. Seems the guy lost 2 fingers and luckly lived to tell about it. There are other stories that were not so lucky.

http://i81.photobucket.com/albums/j212/Tailgunner1954/Blown86Win2.jpg

From Sierra Reloading Glossary:
SEE: Abbreviation for Secondary Explosive Effect. SEE is a condition which can occur when slow-burning powders are used at greatly reduced charge weights (poor loading density). Rather than burning in a normal fashion, the powder detonates, as though it were a severe overload. Also known as a “pressure excursion.”
http://www.exteriorballistics.com/reference/glossary.cfm#s

Here is a typical discussion related to SEE and the results.Pressure spikes and explosions can and do occur when using slow burning powders in large volume cases.
http://www.24hourcampfire.com/ubbthreads/ubbthreads.php/ubb/showflat/Number/2173819/page/1/fpart/1

I would advise you research loading manuals, powder manufacture site, and bullet manufacture site for safe reloading data for youth loads, reduced load, gallery loads, and not endanger your self and other by creating loads that don’t meet safety guideline of the industry.

Just a few of many sites advising of dangers:

Quote:

20. Take special care when working up trial loads with slow burning powders in large calibre cartridges. Light loads in some calibres may produce occasional dangerously high pressures. It is suggested that minimum loads in large calibre cartridges should not be reduced below about 75% case capacity.
http://www.adi-limited.com/handloaders-guide/safety.asp />

Quote:

Follow load recommendations exactly. DO NOT SUBSTITUTE components for those listed and ALWAYS START LOADING WITH THE MINIMUM POWDER CHARGE IN THE LOADS SHOWN.
http://www.ramshot.com/powders/ />

Thanks and good luck,

--------------------
http://mypva.org/home.html
CVT-16 USS LEX BLUE GHOST CATS

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Subject	Posted by	Posted on
Making reduced loads	redchevy	04/02/08 09:26 AM
Re: Making reduced loads	Straight-Shooter	05/15/08 10:02 AM
Re: Making reduced loads	redchevy	05/15/08 04:48 PM
Re: Making reduced loads	Ironwood	04/04/08 07:45 PM
Re: Making reduced loads	Kawabuggy	04/20/08 06:41 PM
Re: Making reduced loads	redchevy	04/22/08 05:15 PM
Re: Making reduced loads	mrbigtexan	04/22/08 10:17 PM
Re: Making reduced loads	redchevy	04/23/08 08:17 AM
Re: Making reduced loads	Crazyhorse	04/27/08 05:54 PM
Re: Making reduced loads	Hipshot	04/27/08 09:47 PM
Re: Making reduced loads	Hipshot	04/27/08 09:47 PM
Re: Making reduced loads	Crazyhorse	04/28/08 07:40 AM
Re: Making reduced loads	WileyCoyote	04/28/08 12:58 PM
Re: Making reduced loads	WileyCoyote	04/28/08 01:18 PM
Re: Making reduced loads	Crazyhorse	04/28/08 04:08 PM
Re: Making reduced loads	redchevy	05/12/08 12:32 PM
Re: Making reduced loads	jeh7mmmag	05/12/08 08:55 PM
Re: Making reduced loads	DannyB	05/12/08 09:50 PM
Re: Making reduced loads	Crazyhorse	05/12/08 10:24 PM
Re: Making reduced loads	redchevy	05/13/08 07:51 AM
Re: Making reduced loads	jeh7mmmag	05/13/08 09:05 AM
Re: Making reduced loads	JJH	04/02/08 09:59 AM
Re: Making reduced loads	WileyCoyote	04/02/08 05:55 PM
Re: Making reduced loads	jeh7mmmag	04/04/08 11:06 AM
Re: Making reduced loads	jeh7mmmag	04/04/08 02:18 PM
Re: Making reduced loads	redchevy	04/02/08 09:51 PM
Re: Making reduced loads	Kawabuggy	04/03/08 07:44 AM
Re: Making reduced loads	WileyCoyote	04/03/08 10:22 AM
Re: Making reduced loads	redchevy	04/03/08 11:15 AM
Re: Making reduced loads	jeh7mmmag	04/02/08 09:49 AM

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