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Thread: Questionable reduced loads with slow rifle powder. Should I be concerned?

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    Legacy Member jarmann's Avatar
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    buen giorno
    I load 26 gn n110 on a 168 gn privi fmj bullet for the 30/06 1903a3 smith corona velocity 636 m/sec gives same results as sr4759 powder with same bullet
    a other few examples
    us krag 18 gn n110 HN ( haenel en natterman) .308 copper plated high speed 180 gn bullet best groups at 100 m
    in danish krag 1889 17 gn n110 .323 190 gn HN bullet also with 17 gn N340 same bullet same results at 100m cases made from 45/90 starlight
    winchester musket 1873 n340 7gn on 200 gn leadbullet (shoots like a .22 rifle) nice groups at 100 m
    a la prossima volta
    greetings from the same site of the pond but a little more to the north/west
    jarmann
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    Quote Originally Posted by jarmann View Post
    buen giorno
    I load 26 gn n110 on a 168 gn privi fmj bullet for the 30/06 1903a3 smith corona velocity 636 m/sec gives same results as sr4759 powder with same bullet
    a other few examples
    us krag 18 gn n110 HN ( haenel en natterman) .308 copper plated high speed 180 gn bullet best groups at 100 m
    in danish krag 1889 17 gn n110 .323 190 gn HN bullet also with 17 gn N340 same bullet same results at 100m cases made from 45/90 starlight
    winchester musket 1873 n340 7gn on 200 gn leadbullet (shoots like a .22 rifle) nice groups at 100 m
    a la prossima volta
    greetings from the same site of the pond but a little more to the north/west
    jarmann
    Hi, do you use any sort of filler with your reloads?

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    Advisability of using reduced loads in slower burning powders

    It has been pretty well documented that using reduced loads of powders that burn slower than medium rates, such as 3031/4895/etc can cause a condition known as detonation. This type of event can ruin the firearm and/or injure the shooter. It is best to be correctly informed on the subject before "experimenting". Search out and read on the subject and use data published in known loading manuals. Better safe than sorry! J. Cooper

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    Advisory Panel Patrick Chadwick's Avatar
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    Quote Originally Posted by Jerome Cooper View Post
    It has been pretty well documented that using reduced loads of powders that burn slower than medium rates, such as 3031/4895/etc can cause a condition known as detonation.

    I would be very grateful if you could provide a link, book title, or reference to such documentation. I am NOT pooh-poohing the concept of detonation, but up to now all I have is effectively hearsay.

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