reloaders

[bestill]

Alot of discussion on smokeless ml board about large rifle primer my question is how sensitive are they to moisture and humidity when open to atmosphere .. i understand they are not sealed primer unlike209 . Thanks

[7mmfreak]

I do not know exactly because I store mine in the house. There are a lot of guys who load out in the garage and probably store their primers there. A cardboard box and plastic tray are not exactly climate controlled anywhere. Maybe somebody who lives in the South and loads in their garage will chime in and tell you how long they have had primers out there and how they perform. I knew guys back home who did it and were amateur BR shooters.

I would venture to guess that if you primed your modules and placed them in vials (like your charges), they will last just fine. I would also guess it would take prolonged exposure to high humidity during a hunt (like in rain or the Congo) before one failed you.

[jims]

Now this was along time ago, over 50 years, but when I was reloading military 30-06 brass I thought I had to enlarge the primer pocket because military brass was tighter to safe guard against moisture and actual water dunking. Also as I recall there was a small red covering around the primer itself. I think I was told it was a lacquer or sealer of some sort to also seal the primer from moisture.
Keep in mind this may have been overkill but for the military ammo could get wet and I am sure they did not want it to migrate internally to the powder, the old phrase of "keep your powder dry" might even apply when black powder was not being used.
I have never had a center fire large primer fail to ignite and have been through some pretty difficult weather at times but how it compares to shotguns I do not really know. Shotgun shells, especially for ducks and geese could see some pretty wet conditions.

[rjhans53]

Some of the primers I'm using are at least 15 years old, they all go bang just fine, oh this is in a high humidity climate, IE: FL I do keep them in the house but that's all I do

[bestill]

Good info to all. I dont do cf reloading my neighbor does and he crazy about not touching lrp with his hands or allowing lrp set out of dry box. He primers a case and immediately loads them. So with that i was curious how a module with lrp exposed to atmosphere would do compared to 209 exposed.

[7mmfreak]

I have left primed cases sitting out in the house for the last couple of months while I was gone. I'm about two weeks out from a new McMillan stock showing up to replace one I sold. When it gets here I'll bed it to the gun, load those cases up, and shoot them and let you know how it goes. I'm fairly certain the load will perform like it always has because I have left primed cases sitting before. I just turn them case mouth down.

[Deleted]

Primed cases use to be all the hype it seems. Those cases were probably primed and shuffled more places than not and the boxes were not air tight. I think your neighbor is right on with avoiding the oils from your skin though. If something happens that's makes a group of primers questionable I won't use them for show time loads.