Put the tins or pellets in a metal-top jam jar or similar.Originally Posted by aris
It's not much use putting them in bags (which tend to breathe) or taping around the edges because the atmosphere breathes. Some days we have low pressure some days high. So over a year or so, more oxygen will be pushed into the tin when high pressure, low pressure days some (oxygen depleted) air comes out, to be replaced with fresh air/oxygen next time round. So oxygen will always be supplied to the lead over time.
If you "put 'em in a cannon jar and seal 'em up tight"*, once the oxygen is used that's it. So as small a jar as possible for least oxygen to start with.
But who keeps pellets that long? Only manufacturers and dealers. Example being 'Marksman' pellets.
[*from "Strawbery Jam" by Michelle Shocked]
Edit: Actually, you'd probably be OK putting the tins in sealed plastic bags unless you want to store them over archeological time...
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