Cartridge sealant

venison

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Do you guys use anything to seal your cartridges from water and oil? I've heard of nail polish and George & Roy's but I have no first hand experience with any of them.
 
The only cartridges I have ever found a need ot seal are the ones I loaded for my Bang-Stik for SCUBA diving. I used the cheapest fingernail polish on the shelf, and sealed around the primer and around the case mouth.

Never have seen the need for sealing any that were to be used above ground...
 
There is something to be said for the military asphalt sealant.

Not only is it impervious to immersion, it also prevents bullet set-back.

IMO, all high-performance - hunting, duty, defensive - ammunition should be so sealed.
 
How do you apply that asphalt sealant? Where do you get it from?

I heard of a drop of nail lacquer before crimping the case neck but I'm afraid that may leave a mess of a crimping die besides it may rise pressure.
 
Because I hunt in a wet climate, I too was curious about sealing my hand loads. But about a year and a half ago, I submerged one of my 45-70 reloads in a glass of water for 2 weeks to see if it is needed. Guess what? It's not needed. That round grouped right where the rest of the 'dry' rounds went.

If you follow good reloading procedures, you should not need to seal your cartridges.

My $0.02.


James
 
The asphalt sealant to which I referred is not for handloading. It is for military specification ammunition that was produced in a factory.

FWIW, non-sealed reloads survive trips through the washing machine with no ill effects.

I still think all high-performance ammunition should be sealed with something like the military asphalt sealant.
 
I have used superglue, a dab on the depression made by crimping the bullet and it runs all the way around and dries clear. You don't need to seal your reloads though, I don't, I just did it the one time for an experiment.
 
Because I hunt in a wet climate, I too was curious about sealing my hand loads. But about a year and a half ago, I submerged one of my 45-70 reloads in a glass of water for 2 weeks to see if it is needed. Guess what? It's not needed. That round grouped right where the rest of the 'dry' rounds went.

If you follow good reloading procedures, you should not need to seal your cartridges.

My $0.02.


James
I dropped some in the snow, dried them off, and shot them. Made me curious, so I also dumped a couple of my hunting loads in a bucked of water, and like you say, they shot just fine on my next outing.
 
I just read an article about sealant in an old Handloaders Digest. The author used asphalt (roofing I guess) and mixed in acetone to make it pasty. Apply into case mouths and let sit until dry/tacky. Only apply as far down as the bullet will go and when bullets are seated, the friction will help warm up the asphalt and form a seal between case and bullet. It helps to stop bullet movement in magazines and revolver cylinders during recoil and apparently helps improve bullet tension or "pull" in taper crimped loads. He also wrote that after repeated loadings, straightwall cases will lose tension due to brass work-hardening and velocities will suffer. The sealant will bump up pressure and help get back those precious fps.
 
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