BT, POWDER DOES DETERIATE Repeat POWDER DOES DETERIATE
It wouldn't do any good to say which powders or where you can get this information because you quite obviously don't want to believe me or think you know more than you do. Your statement about powder deteriorating shows you know didley about he subject.
I guess this company don't know didley about powder deterioration either
From http://www.alliantpowder.com/getting_st ... dling.aspx
How to Check Smokeless Powder for Deterioration
Although modern smokeless powders are basically free from deterioration under proper storage conditions, safe practices require a recognition of the signs of deterioration and its possible effects.
Powder deterioration can be checked by opening the cap on the container and smelling the contents. Powder undergoing deterioration has an irritating acidic odor. (Don't confuse this with common solvent odors such as alcohol, ether and acetone.)
Check to make certain that powder is not exposed to extreme heat as this may cause deterioration. Such exposure produces an acidity which accelerates further reaction and has been known, because of the heat generated by the reaction, to cause spontaneous combustion.
Also, Heres a Quote from a magazine article I found on the subject:
I have access to a gentleman who is an energetics expert. I asked him about smokeless powder lifetime. The whole topic is a subset of “Insensitive Munitions”. A term you can Google and find bits and pieces in the public domain.
Smokeless propellants are used in more applications that just cartridges. Rocket motors, explosive warheads, these all use smokeless propellants.
He told me that powder starts DETERIORATING the day it leaves the powder mill. The rate of deterioration of double based powders is governed by the Arrhenius equation. http://en.wikipedia.org/wiki/Arrhenius_equation
. The hotter it is, the faster it goes. Single based powders apparently deteriorate in a linear fashion.
What the expert told me was that double base powders are made of nitroglycerine (NG) and nitrocellulose (NC). The NG wants to wick its way, through capillary action, into the NC. Forming a lower energy state compound. In the process of combination nitric acid gas is released. As nature wants to go to a lower energy state, this reaction is inevitable. There are preventive stabilizers in the powder which eat up the nitric acid. The stabilizers get consumed over time.
Exposing powder to high temperatures for extended periods of time is bad. Heat accelerates the reduction-oxidation process.
Cool dry storage conditions, he actually said “artic”, are about the best for long term storage of powder.
Now for the last sentence of that paragraph and what I said was Powder can deteriorate because of cold, perhaps I should explained a bit more further. I read 4 articles relating to Ammo and the powders within the ammo. When ammo is taken in and out of warm to cold temps, moisture/condensation tends to form inside the shell. This causes the powder to deteriorate over a unknown length of time. Now since you mentioned FPS, if losing a 100 FPS causes your gun to malfunction, you need to trade it in.
Ive read a bunch of your posts and its evident you are or were a ammo reloader so that makes you an expert as to why guns malfunction. If you believe guns don't malfunction because of certain Lubes getting thick in cold weather so be it, I choose to believe otherwise, based on 40 years of hunting experience
BTW the 9 shells I froze killed 4 Mallards this morning and my gun cycled perfectly without that other 100 FPS