Humidity changes in your reloading room affecting muzzle velocities?

[Distinct_Editz]

Saw the video linked below from Bolt Action Reloading, what do you guys think?

It's quite a good watch if you haven't seen it already. I think this is another variable I'm gonna start watching. I'll look to see if there's a correlation between my MV, and the humidity the ammo was loaded at and if there is a correlation, I'll account for that in ballistics calculations.

Unbelievable! - How Humidity Affects Load Development: https://youtu.be/pzDHRwi3QVk

['ol shooter]

Does your chewing gum lose it's flavor on the bed post overnight?

[Distinct_Editz]

Does your chewing gum lose it's flavor on the bed post overnight?

Would you get any smarter if I told you?

[JackEllis]

I'm skeptical because if what this guy "uncovered" is true, bench rest shooters would be all over it.

['ol shooter]

Would you get any smarter if I told you?

Inquiring minds want to know...

[smoothy8500]

It is interesting that the humidity had a minuscule effect on charge weight, but a large effect on burn rate. He did have a sufficient number of rounds in each sample to validate this test.

[Distinct_Editz]

I'm skeptical because if what this guy "uncovered" is true, bench rest shooters would be all over it.

Me as well, so I hope to test it and see if I get the same results. It makes sense though, the more moisture in the powder the slower it should burn in theory.

I'm less concerned that it will affect my groups though, than it will adding error to my ballistic calculations.

['ol shooter]

An interesting video, thanks for posting the link. He sure has a neat loading room, highly suspect.

[Donny1]

I got bored just watching the video, reloading can be tedious enough sometimes. Maybe if I had no job and unlimited resources I would try it

[zeneffect]

this is calguns and humidity effecting burn rate is something new to us? We experience this phenomenon every single year on a far larger scale.

the gum on bedpost is quite a good analogy actually.

[Distinct_Editz]

this is calguns and humidity effecting burn rate is something new to us? We experience this phenomenon every single year on a far larger scale.

the gum on bedpost is quite a good analogy actually.

It is new to some of us, because quite frankly not everyone knows everything. I was surprised by the results, learned something and shared it with the community.

['ol shooter]

I did thank you for posting it, it's good thought material.
I do keep my powder tightly sealed in their containers inside a cabinet, my primers in a separate cabinet, and all in a spare bedroom that never gets below 68 degrees F. I also live in a semi-arid climate.
Your post did pique my interest enough that I bought a spare Eva-Dry unit like I use in all my gun safes. They are indoors as well.
I am going to set it in my loading room and see how long it takes to get wet enough to need recharging.
I tried the small packets in ammo boxes and they turned rapidly even though the ammo boxes were kind of moisture resistant, (Harbor Freight).
They failed an immersion test on a You Tube video.
I actually don't know anything, just ask my wife and kids.
Keep up the good work.

[Distinct_Editz]

I did thank you for posting it, it's good thought material.

Hey I'm glad you got something out of it, and keeping the powder in the original containers in an air conditioned room is going to be just fine for almost all of us. But don't think my last reply was directed towards you which is what I think is going on here.

Anywho, I guess it's just surprising to me because "Temp Sensitivity" is the main thing I hear talked about when it comes to powders, so I never truly realised how sensitive powder is to humidity (granted humidity is rather stable in MOST homes, so that's probably why not many people worry about it.)

['ol shooter]

Yeah, poor cold weather ammo performance is a reality.

[pennstater]

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