Copper jacket/Brass jacket

[CMB]

Could someone please explain the benefit of having a brass jacketed bullet verses a copper jacket? I see Rocky Mountain is carrying .355 brass Jacketed that cost a little more than copper of the same weight. Does it transfer less to the barrel when fired? Years ago I believe I purchased some Berry's that were brass HPs but didn't think about the jacket material.

Please educate me.

Thanks-

 

[Dudedog]

Apples/Oranges, Ford/Chevy thing. Both should work just fine.
I have shot brass jacketed and copper jacketed and I didn't really notice any difference in how dirty the barrel was, but to be fair I wan't really trying to compare the two for that at the time.

 

[mcb]

I put tens of thousand of rounds of Montana Gold brass jacket bullets down range without issue. The brass jacket have the potential to be a bit harder and in theory slightly more uniform in shape than copper assuming the maker is doing it right, but in the end their is not much difference.

 

[CMB]

Montana Gold - that's the one I was trying to think of. Thanks for the reply. That's kind of what I expected but with the price difference - maybe there was more to it.

Thanks Again,

 

[Dudedog]

Most likely the price difference is because RMR brought in the brass jacketed ones from somewhere to have supply for people in a hurry, if that is the case they were probably more money than the ones RMR makes themselves.
Don't know this just guessing.

 

[Swampman]

The vast majority of todays bullet jackets are gilding metal, which is a form of brass.

Jacket color can vary with the amount of zinc used.

Plated bullets often have pure copper "jackets" because alloys don't play as well with electrolysis.

 

[cfullgraf]

There is an outfit that makes bullet swaging equipment, unfortunately their name escspes me at the present.

Anyway, they sell dies and equipment to make 22 caliber rifle bullets using fired 22RF cases for the jacket material. There are s number steps the cases go through including annealing.

Anyway, a proper alloy whether brass or copper will
Work fine for jacket material.

 

[nettlle]

RMR just started offering brass jacketed in addition to FMJ. Brass jacketed is "New". Whatever the word "New" means pertaining to bullets.

 

[Dudedog]

Brass jacketed is "New". Whatever the word "New" means pertaining to bullets.

New as opposed to pulled I think or a new offering. (new to RMR)

 

[243winxb]

https://www.thehighroad.org/index.php?threads/brass-jacket-bullets.872761/

Cartridge brass can be use to swage lead core bullets. http://www.corbins.com/

The alloys are different, with cartridge brass being harder. View attachment 999411

 

[FROGO207]

There is an outfit that makes bullet swaging equipment, unfortunately their name escspes me at the present.

Anyway, they sell dies and equipment to make 22 caliber rifle bullets using fired 22RF cases for the jacket material. There are s number steps the cases go through including annealing.

Anyway, a proper alloy whether brass or copper will
Work fine for jacket material.

The name is Corbin. They make bullet swaging equipment. I do not personally see much difference between types of jackets myself either.

 

[9mmepiphany]

Could someone please explain the benefit of having a brass jacketed bullet verses a copper jacket?

Availability.

Currently all bullet manufacturers are having a hard time sourcing copper for jacket material...that is why there has been a sudden increase in primers on the market

 

[9mmepiphany]

Brass jacketed is "New". Whatever the word "New" means pertaining to bullets.

In the case of RMR, they use three designations for their jackets bullet offerings: In-House, Pulled, and New.

They use "New" to indicate that the bullets are not being manufactured on in-house machinery and they are also not pulled bullets

 

[CMB]

Availability.

Currently all bullet manufacturers are having a hard time sourcing copper for jacket material...that is why there has been a sudden increase in primers on the market

This is very true - not only bullet manufacturers this is a global thing right now. We needed 20k feet of a specific computer cabling and none to be had. I asked our distributor and he said the same thing copper supplied are down world wide. On the commodities list it's at a 10 year high. Hmmmm.

 

[jmorris]

Anyway, they sell dies and equipment to make 22 caliber rifle bullets using fired 22RF cases for the jacket material. There are s number steps the cases go through including annealing.

Here are some other examples of jackets from brass, made by ReloaderFred.