No Cold Welding

[Brians356]

Yes they will. Always easy to set up a well labeled test

But the wait for any significant bonding would be measured in years.

If the inside of the necks and the inside edges of case mouths are burnished with steel wool prior to seating, I don't think that moly (properly applied) would be scraped off entirely if at all. A layer of moly between jacket and neck brass would prevent effective bonding IMO. I've shot a lot of moly bullets. The only bonding I've noticed was with bare bullets as noted earlier in this thread, stored for a decade or so.
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[AJC]

But the wait for any significant bonding would be measured in years.

If the inside of the necks and the inside edges of case mouths are burnished with steel wool prior to seating, I don't think that moly (properly applied) would be scraped off entirely if at all. A layer of moly between jacket and neck brass would prevent effective bonding IMO. I've shot a lot of moly bullets. The only bonding I've noticed was with bare bullets as noted earlier in this thread, stored for a decade or so.
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The carbon I believe acts as a chemical cadilist enhancing the galvanic reaction. A wet tumbled clean piece of brass with a molly barrier would resist reactions imo.

 

[joshb]

The cold welding is really like electrolosis without the current. Its the dissimilar metals

Galvanic corrosion. If you’ve ever owned an aluminum boat, or any boat, you’ve seen it. Boats kept in or near salt water suffer the accelerated affects of it. Copper and brass are closer than stainless and aluminum so it happens slower. Take away the moist environment and it slows down a lot. I wonder if the military uses something? I bet they did research on it. Gotta be an Army study on it somewhere!

 

[mike mccormick]

The cold welding is really like electrolosis without the current. Its the dissimilar metals

I believe the term is " galvanic corrosion"

 

[mike mccormick]

Galvanic corrosion. If you’ve ever owned an aluminum boat, or any boat, you’ve seen it.

Ha! We must have been typing in stereo

 

[joshb]

Ha! We must have been typing in stereo

We must be smarter than most?

 

[mike mccormick]

We must be smarter than most?

You may be, don't know about myself. I can do some pretty dumb stuff on occasion! Lol

 

[joshb]

When I get a good idea, my wife says “ Two cells in your brain finally connected! It’s a miracle!”

 

[Brians356]

Take away the moist environment and it slows down a lot. I wonder if the military uses something? I bet they did research on it. Gotta be an Army study on it somewhere!

I thought military rounds are sealed, neck and primer, with a shellac-like substance to exclude moisture.
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[AJC]

I thought military rounds are sealed, neck and primer, with a shellac-like substance to exclude moisture.
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They do use a sealant. The stuff I dealt with was black when i.pulled down some milsurp ppu. It definitely didnt help accuracy and was a pain to get off. I was doing a test where I pulled them down to equalize powder levels to see if I could make them better. Still 3moa.

 

[DocBII]

I thought military rounds are sealed, neck and primer, with a shellac-like substance to exclude moisture.
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Brian,

What I've seen is a tar-like substance. You can use sealing tar for tree branch cuts to do the same thing. A little on a Q-tip goes a long way. I doubt it will prevent cold welding, but would help if moisture gets into the case via the neck. It won't help if the powder does not have the acid used to create the powder is not rinsed sufficiently to remove the acid.

For a completely sealed case, nail polish the primers as well. Nail polish on the case neck/bullet junction might work until the round is banged around, but can lead to variable neck tension.

HTH,
DocBII

 

[The boogalorian]

Interesting video.