Storing 17hmr ammo long term

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curtism1234
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Storing 17hmr ammo long term

Post by curtism1234 »

I spoke with Hornady today about some 10-11 year old 17hmr vmax ammo I have. The cases are splitting about 1/3 the way down and getting stuck in the chamber. I suspected they were part of a recall (which they purge recall info after 10 years) but I was given an answer somewhere between over my head and a load of crap.

Hornady is saying the 17hmr cases have a shelf life, the brass weakens/stretches, the bullet then seats itself deeper and causes pressure. Additionally you shouldn't keep ammo past 10 years b/c 10 years is consistent with SAAMI recommendations.

I think all that is a load of crap and the fact they changed something with their brass a few years reflects that.

Anyway, if you believe what they say, you may not want to buy hmr ammo in bulk unless you shoot them in a couple years

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Re: Storing 17hmr ammo long term

Post by Bang »

I don't claim to be a metallurgist, but if it looks like a bullshit, it walks like a bullshit, and it quacks like a bullshit...

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Re: Storing 17hmr ammo long term

Post by Sarge »

I don't know.. it could be legit.. all depends on storage conditions

If you ammo sat for any length of time where it could be exposed to ammonia cleaners or their vapors like in a garage storage cabinet with cleaning supplies .. and it wouldn't have to be the whole 10 years. a few months could do it.. you would expect the brass to be brittle and have cracks, especially thin brass..

Not trying to start a fight or take sides.. but to extend what is basically something that is chemically reactive a 10 year warrantee could be considered going the extra mile... but then so would including comprehensive storage instructions for ammo or at least warning folks what constitutes a hostile storage environment

http://mb.nawcc.org/showthread.php?8194 ... ss-cleaner

notice the conditions that they cite in the article... did you store the ammo in a room with a cat box or near a spot where the dogs marks it's territory

Mercury compounds can have a similar effect http://webpages.charter.net/kwilliams00 ... ercury.htm https://chemistry.stackexchange.com/que ... teel/43923 common household uses of mercury https://www.epa.gov/mercury/mercury-con ... ducts#list

see also https://en.wikipedia.org/wiki/Brass specifically cartridge brass is called yellow brass with it's own specific composition and characteristics https://www.azom.com/article.aspx?ArticleID=6360

anyway.. totally possible that storage conditions/ environmental situation could do exactly what you describe .. especially given the very thin nature of the brass and the extreme pressures of firing.

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Re: Storing 17hmr ammo long term

Post by atxgunguy »

Too late for what you already have, but sounds like you need to either shoot it more often or be diligent about rotating your stock. Pretty sure I don't have anything in my stocks over a few years old.
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Re: Storing 17hmr ammo long term

Post by Wino »

I'll get back to this thread in about 4.5 years or so. Have a lot of .17HMR and doubt it'll all be used by then. :geek:
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Re: Storing 17hmr ammo long term

Post by Bucolic »

Shit, I better go shoot some of mine! I really hate cleaning the tiny bore of my .17.
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