If the tin is sealed I don't think it's a problem at all, once the tin is open they will start to oxidise because it's a natural reaction, but again...
Never considered this an issue. As long as they are accurate I just use as they are. If any are grouping badly they are used for short range plinking...
It's allowed just not mega easy as the forum is an older software, you'd need to figure out how to embed it in a post and upload it to somewhere like...
Funny enough I've been checking pellet stock and although most tins are still sealed I have a number of tins of pellets that have lost their shine, ...
How about a videos section on the forum for budding Cecille B DeMille's and Steven Spielbergs to showcase their movie making skills ?. Phone videos,...