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Scourch, In the real world I am surrounded by a few very talented people, those that are not are sitting home with a frown, arms folded with a closed mind.
If one thought heating a container to expand the atmosphere inside the container before closing the lid would or would not reduce the moisture inside the container someone would suggest heating a jar then after cooling place the jar in the refrigerator. Cooling the atmosphere inside the jar would cause the moisture to condense, if that did not work they would place the jar in the freezer, at a temperature between 0 and -13 degree, they would also close the lid on an unheated jar, there is something about going up in altitude that causes the atmosphere to loose its ability to hold moisture. Or a piece of paper could be dropped into the container that turns blue if moisture is present.
If one of them could not open a container because of the PSI thing one of the others would suggest the 'KEY' and of course the one trying to open the problem he created by expanding the atmosphere would ask "KEY"? Then one would ask, "How did you get that can into that condition in the first place"?
And those with a working knowledge of tools would install a valve to equalize the pressure inside and out.
Doubts about the vacuum: Ever time the subject is brought up on a reloading form the same responses is sure to follow, "The maximum vacuum can not be obtained my mere mortals, just like head space gages, head space gages are made on mars by Martins" Because they are precision ground?? The very talented group have the ability to measure precision and the head space gage is not in that category.
F. Guffey
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