Humidity changes in your reloading room affecting muzzle velocities?

[slamfire1]

I could not figure out if he was heating the gunpowder as a means to dry it. That will age gunpowder.

I don't know how desiccant affects gunpowder. Gunpowder is not inert, it reacts with ionic compounds. If the desiccant ages gunpowder, the pressure curve will go up.

[sofbak]

^^^^^. I'm afraid I'm going to faint, and fall in it..

A succinct, TWO PARAGRAPH post from slamfire?!?!?!

I am overwhelmed with astonishment and disbelief.

[Distinct_Editz]

As has been mentioned here and other forums; store your powder and primers in a cool, dry place[as 'ol shooter said], and it will last for a LONG time safely.
This really ought to be common knowledge with handloaders. Store outside in a shed in Florida, well.......

MLC

Yes it's common knowledge, but no one that I know of in any forum has ever actually tested the effects themselves and published the data.

[Distinct_Editz]

I could not figure out if he was heating the gunpowder as a means to dry it. That will age gunpowder.

I don't know how desiccant affects gunpowder. Gunpowder is not inert, it reacts with ionic compounds. If the desiccant ages gunpowder, the pressure curve will go up.

He was not heating the powder to dry it. The dessicant he has is enclosed in a coordless box, that, when it is fully saturated, allows you to heat the dessicant to replenish its ability to absorb moisture by baking the moisture out of the silica gel (dessicant).

He did a bad job at explaining it, but I hope that makes sense.

[slamfire1]

He was not heating the powder to dry it. The dessicant he has is enclosed in a coordless box, that, when it is fully saturated, allows you to heat the dessicant to replenish its ability to absorb moisture by baking the moisture out of the silica gel (dessicant).

He did a bad job at explaining it, but I hope that makes sense.

I am puzzled by the whole video, and wonder if he is right, or, if something else was going on due to his drying activities.

Might explain all my velocity variations. I load in all weather.

[slamfire1]

As has been mentioned here and other forums; store your powder and primers in a cool, dry place[as 'ol shooter said], and it will last for a LONG time safely.
This really ought to be common knowledge with handloaders. Store outside in a shed in Florida, well.......

MLC

The primary reason for storing powder in dry and cool conditions is to slow the break down of gun powder. Water is polar covalent, the "ionic" end will break the double bonds of the NO molecules of nitrocellulose. Anything ionic will do that, all that rust in those old tin cans is bad for powder. And then heat. According to TM 9-1300-214, Military Explosives, section 7-7, the rate of decomposition of nitrocellulose increases 3.71 times with each 10 degree C temperature increase.

[the86d]

If I leave primers out in my computer/reloading/vaping room, in open air, mind you, where the windows is always cracked too, I have a LOT more failures...

Not sure if it's the cracked window, or the eLiquid...

Lots of things can change dramatically when, or when NOT "moist"...