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nickel bullet cases


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Im currently using Magtec nickel coated 357 cases and i can reload these many more times than PPU brass,but i have noticed something very odd recently. Despite the cases being reloaded around 20 times and still in good condition-the primer pockets appear to be getting bigger. Last week when i was reloading a number of primers slipped in way too easily for my liking and two actually fell out when i turned the case upside down.

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Well something made them bigger! Speed alone is not a proof of safe pressure by the way

 

The odd thing is this box of cases is mixed-its about 2/3 Magtec nickel and rest PPU brass,but only a few have failed and only nickel.They're definetly not over pressured and all loaded the same,but it just seems that while brass degrades gradually the nickel fails in an instant like this.I'll switch to another box of cases and try them.

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Ok, I don't personally reload so this is a bit interesting, I have used nickel and steel cases so why, steel was military, and designed for one time, and cheaper, I guess (although I have had some reloaded), so why is nickel used?

 

Can't remember using any CF nickel, mine are .22lr and .22WMR nickel!

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When a case expands under pressure it grips the chamber walls to some extent reducing what can be termed 'bolt thrust'. Yhis is why a proof load van be lubricated to deliberately increase the force bourne by the bolt and surface finish on the case can obviously be a factor, expecially with mixed loads. Im not saying im right or wrong but it certainly adds factors to the equation?

 

Sounds credible to me!

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Im currently using Magtec nickel coated 357 cases and i can reload these many more times than PPU brass,but i have noticed something very odd recently. Despite the cases being reloaded around 20 times and still in good condition-the primer pockets appear to be getting bigger. Last week when i was reloading a number of primers slipped in way too easily for my liking and two actually fell out when i turned the case upside down.

Maybe because of too vigorously cleaning the primer pockets

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I inherited some Remington 300WM nickel cases

initially I think people are put off by things they are not used to, I was.

but...

 

they don't appear to be harder to size, trim or seat

They haven't split (well apart from the ones that I managed to oversize and separated the case head.....but thats another story!)

they haven't scratched anything

 

don;t know what all the fuss is about

I have even mixed them with brass of the same loads and they group and shoot just like any other

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