machine gun brass id

[mocos]

is there a way of identifying brass that has been fired out of a machine gun?

[ar15barrels]

It usually has a really long shoulder dimension.
Headspace length gauging tools are required.

[Timberwolf]

Also look at the brass - if it was linked with metalic links they scratch the crap out of the brass.

[Beelzy]

Also look at the brass - if it was linked with metalic links they scratch the crap out of the brass.

Yep, that's the fastest way to tell, look at the area behind the shoulder.

[mocos]

It usually has a really long shoulder dimension.
Headspace length gauging tools are required.

you mean go-no go gauge ? and the brass has been tumbled/polished so, as far as link marks...maybe.

and if it is machine gun brass, what can be expected of it's durability as opposed to rifle fired brass

[mocos]

Yep, that's the fastest way to tell, look at the area behind the shoulder.

you mean below the shoulder toward the base....over size.. because of the generous chamber size for machine guns?

[ar15barrels]

you mean go-no go gauge ?

No, case gauging tools.