In other words all things being equal FFFG will get just as wet as FFFFG. Now FFFG from a DIFFERENT LOT may have different characteristics. GOOD powder should not pull excess water from the air "glazed" or not. But since FFFFG, FFFG and FFG are made in the same manner....
I guess we can agree to disagree
Centershot
I am not saying that your FFFFG did not turn to goop. I am attempting to explain the reason.
So I must ask.
Disagree based on what? Do you disagree that powder made with potassium nitrate contaminated with sodium nitrate will suck moisture from the air? Or that powder made with pure potassium nitrate will not suck up enough moisture from the air to turn to goop? Or that if the powder sucks up water from the air and turns to goop its very poor powder from the standpoint of purity of its ingredients?
The statements I made concerning purity of the powders components and its ability to absorb water from the air have been known for centuries. Good powder if made damp by contact with liquid water will actually give up water to the atmosphere at pretty high relative humidity levels. Like on a back porch in PA. If not damp enough to seriously damage the grains *good powder* can be spread in the sun on a piece of canvas etc and dried.
Powder made from the same materials, milled the same and finished the same will have the same affinity for water. The "glaze" on Swiss powder is actually a thin film of potassium nitrate formed during the final drying process. It has not be treated with "black lead" (graphite) to make it shiny. Now FFFFG *may* turn to goop a little faster than the larger granulations will but all will become very difficult to ignite pretty quickly under the same conditions since the surface of the grains will get wet first as the contaminated potassium nitrate sucks up water from the air. So even a large grained powder will fail in high humidity. IT WILL NOT return the water to the atmosphere unless subjected to very low humidity and probably heat. As stated this has been known for a VERY long time. Powder makers of the past were near fanatical about the purity of the Potassium Nitrate BECAUSE OF THIS PROBLEM. However, powder made in the US for quite some time was not made with pure potassium nitrate (this is no longer the case and it was the result of a nitrate seller shafting the powder maker from what I have been told) as a result older powder, depending on lot, might be pretty bad.
To state that FFFFG powder will suck up moisture when FFFG will not must take into account the characteristics of the powder itself. If you had a lot of FFFFG that was made with pure potassium nitrate and a lot of FFFG with potassium nitrate that has significant levels of SODIUM NITRATE (even 1% is bad) the FFFG will be seriously if not fatally damaged by high humidity and the FFFFG will not.
If you go out in the woods and FFFG always works and FFFFG absorbs water like a sponge the FFFFG is $#@*. If it were not $#@* it would not absorb water FROM THE AIR to the point of being soggy black goop.
Its just a fact.
Dan