12ga 1-7/8 load on a hot day with overpressure/split hull

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I had a near mishap, loaded up some federal hunting shells, 3" with 24 grains 800X, waa12r wad, cheddite primer, went to try it, and the fallowing pic explains what happened, it was about 30 degrees C. out and i had just shot about 10 shells, so everything was hot, i think there was too much pressure, i have the data and 24 grains is max load at 10800psi, just the hot day i think made it worse. i have loaded before 21-23 grains as the same without issue.

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Was the primer dent inverted? I often run into pressure signs with shotshells in the primer well before I get hull failures like that.

I have played around with well above max loads with Alliant Blue Dot in 12ga before without any issues with the primers or hulls. Looking it up 800X looks to have a burn rate somewhere between Blue Dot and Unique (I use Alliant for shotshells). 24gr of Blue Dot is a very mild load with 1-7/8oz of shot but there is no data for Unique with that amount of shot. Where is your load data from? I can't find anything on the Hodgdon site for 800X with that amount of shot. It only had data for HS-7 and Longshot which are much slower burning powders than 800X.

Even if it was a hot load you should have had signs around the primer or hard extracts well before a hull failure like that. My guess would be a bad hull and not necessarily the overpressure that did it. How many times had that hull been reloaded? With near max or above max loads I find even the best hulls only last 2-4 loads. Considering only physical temperature and not perceived temperature caused by humidity has any effect on inanimate objects I can't see 30'C effecting the pressure too much. Modern powders are designed to burn with consistent pressure at most normal daytime highs and lows. 30'C isn't even that extreme of a temperature all things considered.
 
Yeah, I'm thinking the same thing. Too fast a powder and the hull gave way. Any damage to the gun or the barrel?
 
jfarrell said:
Double charge?
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I'm not saying it wasn't since I don't know anything about the OP but full double charges in shotshells are very hard not to notice. I've done some on purpose to see how they would crimp and if I would notice and you would have to be blind not to notice. The shot wouldn't even all go in and it was impossible to crimp due to the extra 1/4" the double charge took up. If it was a very light load, maybe 10gr or so, it may be possible, but with a 24gr charge of any powder I have seen you will have an extra 1/8" to 1/2" in the shell.

antiqueguy said:
them federal hunting hulls like to split and pull the crimps off looks normal carry on
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Come to think of it it was Federal hulls both times this happened to me. And it's more often the Federal hulls that loose individual pedals as well for me.
 
antiqueguy said:
them federal hunting hulls like to split and pull the crimps off looks normal carry on
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Agree. Hard to tell from the pic but it looks like the ones with the melted final crimp which are not normally reloaded. The walls are paper thin on those
Not a double charge that is for sure almost impossible to put that much 800x into that hull if you can get it to even flow in the reloader.:p
To the OP is it a fiber or plastic base. Old buck shot hulls by any chance???
 
3macs1 said:
Agree. Hard to tell from the pic but it looks like the ones with the melted final crimp which are not normally reloaded. The walls are paper thin on those
Not a double charge that is for sure almost impossible to put that much 800x into that hull if you can get it to even flow in the reloader.:p
To the OP is it a fiber or plastic base. Old buck shot hulls by any chance???
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my guess its a paper base wad he did say federal hunting hulls witch are the paper base wad ok hulls but they dont last long. they also make a plastic base wad one thats packed in the same type of box and with the same type of load(steel shot) but these are not federal hunting hulls there some other type i think they may be listed as the .090 base wad
 
LUTNIT said:
Was the primer dent inverted? I often run into pressure signs with shotshells in the primer well before I get hull failures like that.



Even if it was a hot load you should have had signs around the primer or hard extracts well before a hull failure like that. .
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primer wasn't inverted but it was flattened and had the bolt face impressed into part of the shell, this was only the first reload of this shell.
This hull was the only one that had a hard extraction
 
3macs1 said:
Agree. Hard to tell from the pic but it looks like the ones with the melted final crimp which are not normally reloaded. The walls are paper thin on those
Not a double charge that is for sure almost impossible to put that much 800x into that hull if you can get it to even flow in the reloader.:p
To the OP is it a fiber or plastic base. Old buck shot hulls by any chance???
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its old turkey hunting shells, and they are plastic base.
 
You had trouble extracting it as well if I remember correctly

I use blue dot or hs6 for my heavy loads but I use sts hulls. They are the best in my opinion. But rarely do I ever load more then 7/8oz now. If it can't be done with 7/8oz of shot or slug ill use a bigger gun
 
well i found my issue, oops, opened up 3 others i loaded and all had 2.25oz in the shell, powder was right but somehow i thought it should have been 1 7/8
 
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