Somewhere in guidance there the calculation to work out the theoretical explosive content of a primer.
I cant find it.
Its something like 0.0142 gns per primer.
Does anyone know what it is?
Thanks.
Primer explosive content calculation
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All handloading data posted on Full-Bore UK from 23/2/2021 must reference the published pressure tested data it was sourced from, posts without such verification will be removed.
Any existing data without such a reference should be treated as suspect and not used.
Use reloading information posted here at your own risk. This forum (http://www.full-bore.co.uk) is not responsible for any property damage or personal injury as a consequence of using reloading data posted here, the information is individual members findings and observations only. Always verify the load data and be absolutely sure your firearm can handle the load, especially older ones. If in doubt start low and work your way up.
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The Gun Pimp
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Re: Primer explosive content calculation
Many years ago (the now defunct) Precision Shooting magazine did a test on this very subject - complete with photographs of the 'flash' produced by each primer. The only bit I can remember is that Federal primers added the least to the effect of the powder charge.
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Ovenpaa
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Re: Primer explosive content calculation
Bit off topic however if you do want to know about the ignition characteristics of primers I did this 10 off years ago. The action was a prototype aluminium job we built and the cartridge was .308 Winchester.
https://shootingshed.co.uk/wp/2012/12/c ... n-testing/
https://shootingshed.co.uk/wp/2012/12/c ... n-testing/
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Pete
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Re: Primer explosive content calculation
There's a bit about this topic in "The Benchrest Shooting Primer published by Precision Shooting Inc., ISBN no 13:978-0-9670948-7-8, page 131 "Primer Tests" by Steve Chernicky.
There are some interesting pics of the actual point of detonation showing the flame shape/size.
Pete
There are some interesting pics of the actual point of detonation showing the flame shape/size.
Pete
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Peter Leigh
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Re: Primer explosive content calculation
Many years ago we were asked to do some basic heat energy/ joules measurements on some rifles primers....results are long gone. But if I remember, results were not what you would expect...ie a magnum primers heat output was the same as a standard primer. I wonder if thats still true now?
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Re: Primer explosive content calculation
It was always an ammunition fallacy and myth, like lead bullets must be hard, that magnum primers work by burning hotter.
Magnum primers burn longer, that is what makes them Magnum and helps ignite slow burning and or compressed powder.
Magnum primers burn longer, that is what makes them Magnum and helps ignite slow burning and or compressed powder.
Come on Bambi get some
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mag41uk
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Re: Primer explosive content calculation
Thanks for the replies. Maybe I didnt word the Q correctly.
I was looking for the "sum" to work out primer explosive weight content as part of NEQ`s.
I found it in the 2014 Explosives Regulations.
"Note: Ammunition net mass is calculated by the weight of powder and the explosive content of the
primer that is used. As an accepted rule, 0.8 of a grain is allocated as the explosive content of any small
arms primer/percussion cap."
I was looking for the "sum" to work out primer explosive weight content as part of NEQ`s.
I found it in the 2014 Explosives Regulations.
"Note: Ammunition net mass is calculated by the weight of powder and the explosive content of the
primer that is used. As an accepted rule, 0.8 of a grain is allocated as the explosive content of any small
arms primer/percussion cap."
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