I am thinking they are there to vent gases in case of an inadvertent ignition and prevent the tins from becoming little bombs spraying shrapnel. There are a number of federal agencies, including the DOT that regulate things like smokeless and black powder shipping and storage containers and cans, and they all have to be designed not to hold pressure.Unfortunately it seems pretty common nowadays for there to be a joke or jokes in the tin containers. It might be some stupid federal environmental regulation for all I know. Or a EU environmental regulation.
To prevent condensation is an interesting excuse. Allowing for air pressure changes is another good excuse for it too.
If the containers are tin you can always solder over the hole(s) closing it up. But don’t solder over the holes with the caps in them though.
Hmm, interesting, the only thing I can think of is they are there as venting in case of a detonation, cook off. Perhaps a legal thing.
Did they come in a plastic blister pack or a carboard box?
Kiwi shoe polish cans usually have a hole in the lids also.Just noticed these holes on the backside of the CCI tins I just got from Academy. Aren’t these tins supposed to be airtight?
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Soldering is overkill. If the holes bother you just put a couple of small squares of tape over them.Unfortunately it seems pretty common nowadays for there to be a joke or jokes in the tin containers. It might be some stupid federal environmental regulation for all I know. Or a EU environmental regulation.
To prevent condensation is an interesting excuse. Allowing for air pressure changes is another good excuse for it too.
If the containers are tin you can always solder over the hole(s) closing it up. But don’t solder over the holes with the caps in them though.
Atmospheric pressure changes are often the culprit.Kiwi shoe polish cans usually have a hole in the lids also.
I believe it is to let air into the cans to eliminate creating a vacuum effect when trying to get tight-fitting lids off.
I have encountered lids on percussion cap cans that were so difficult to get off that I had to use knife blades, ice picks, and channel lock pliers to get the lids off. Part of the problem may have been my creating a vacuum when pulling on the lid.
Ya, especially when it comes to my sinuses. I prefer to abstain from drilling holes in them, nevertheless.Atmospheric pressure changes are often the culprit.
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