Just trying to create controversy [message #44031] |
Mon, 05 March 2018 22:31 |
pinecone
Messages: 116 Registered: May 2014 Location: Northwest
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Junior Member |
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I've been reloading rifle calibers for a long time. I'm just starting get into the realm between slow pistol powders and fast rifle powders and the dreaded detonation, pre-ignition, secondary ignition and flashover from reduced loads!! I've always respected it but never studied it until now.
I'v read on the forums everything that say it doesn't exist to "I blew my gun up 5 times but only my neighbor was hurt" !!
So on to the context: With the advent of the MSR's (Modern Sport Rifles i.e Black guns) I find guys using small amounts of the fastest pistol/rifle powders in much larger cases (300 BO, 308, 350 bewolf, etc.) in the process of seeking Subsonic loads or low velocity loads for quieter and I guess less offensive shooting. I personally can't tell much difference in sound but my hearing isn't the best. I don't know if it was 35 years of helicopters or because I didn't shoot subsonic loads...? I read that "never load less than 10% of the published maximum load", which if you do the math is usually the published minimum. 4895 can be reduced to 60 % per the manufacture. You can't fill a straight wall case with enough slow rifle powder to get to maximum pressure but if you go 2 grs. under minimum your gun will blow up. You can safely load any load 10% under the published minimum..... and many more.
I truthfully don't understand because I have never found a plausible explanation for any of the above. Now you see modern powders that are declared non-position sensitive, not temperature sensitive and in the case of Trail Boss, load anything to the bottom of the bullet and shoot so these powder types should do away with the problem, right? While I don't know about reduced loads I do know about Boyle's Law and that could possibly lead one to think that flash over or what ever you want to call it couldn't happen ! to stir the pot a little, does anyone have thoughts or Ideas on the subject, would appreciate the input.
[Updated on: Mon, 05 March 2018 22:34] Report message to a moderator
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Re: Just trying to create controversy [message #44034 is a reply to message #44032] |
Tue, 06 March 2018 08:49 |
gemihur
Messages: 309 Registered: March 2012 Location: Ridgelines of Virginia
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Forum Regular |
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In my experience of searching for reduced loads, you must also achieve adequate pressures to seal the chamber's throat with expanded brass or blow-by will occur down the case wall. This was in reference to use of 13.0 gr. of Trail Boss behind a light for bore, 265 gr. .455 Webley bullet in 45-70. The bullet's design utilized a hollow base that I was hoping would obturate for gas seal in the bore. A heavier round might have given sufficient cartridge to chamber seal to avoid the blow-by. Sunny's recommendations are valid, a variety of powders/loads will need to be experimented with until you stumble upon the recipe that your barrel delivers the results that you seek. H4198 reduced loads is a good place to start.
http://www.hodgdonreloading.com/reloading-education/tips-and -tricks/low-recoil-loads
Think twice...shoot once.
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Re: Just trying to create controversy [message #44042 is a reply to message #44040] |
Tue, 06 March 2018 19:11 |
gemihur
Messages: 309 Registered: March 2012 Location: Ridgelines of Virginia
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Forum Regular |
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I've resigned to shooting reloaded ammo that is more "middle of the road" on the load charts and am less interested in untroddened ground.
I find bullets fly better when they fly faster.
Think twice...shoot once.
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Re: Just trying to create controversy [message #45865 is a reply to message #45864] |
Wed, 12 February 2020 15:33 |
ozojo
Messages: 6 Registered: February 2020 Location: Tennessee
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Forum Newbie |
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GunBlue490 has vids on primers too, and many other things of great interest.
A knowledgeable, well-respected retired police detective, with experience.....
in other words, a good old f**t.
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