Very interesting, if it is Aluminum....Just a few comments... no primer crimp, and where does it say 5.56 ?

 

where does it say 5.56 ?

Military brass doesn't usually have the caliber on the headstamp. The little dots say which Lake City machine it came off of.

Tim

 

I found this from Buds Gun Shop.

Description says Legend Basic Lake City "Tinstain" plated brass cartridge.
Cannot find anything else on the inter-web.

Thanks,
Glenn

 

Mmmmm. Maybe an anti corrosion coating?

 

The linked Bud's Gun Shop ammo... seems kinda funky to me.. why would anyone go to the trouble to "TinStain" perfectly good brass cases.

Seems kind of dubious.

They might be fine, I don't know... but it worries me when it is difficult to look up a Ammo manufacturer.

L-Tech Enterprises Inc. ?

 

how much does the LC17 case in the photo weigh?

 

I don't like that "Tinstained" brass, Proof loads are in cases that look like that!

Casey

 

If it's possible, section one and see...

 

ill go ask our ammo tech. he may know...

theres no cross on it either. it may be for civilian use, who knows?

 

I just asked the base ammo tech and hes never heard of it.

 

I cut into the case and it does appear to be brass with a heavy coating of what ever it is plated with. I forgot to weigh it first to see if it was the same weight as a regular LC17 case.

 

Counterfeit Chinese ????

 

I _think_ Sage's reloading had a bunch of these awhile back. Not sure what the story is on them.

 

I asked my uncle who works at Lake City. I haven’t heard back from him

 

There has always been a problem with aluminum cases in 5.56mm and 7.62mm which has yet to be solved - burn through.

As a report wonderfully under-stated:

When a mechanical case failure is encountered during the firing of aluminum cased ammunition, particularly with high-pressure, high-performance weapon systems, the failure of an aluminum cartridge case is characterized by a large efflux of very luminous gases at the breech of the weapon, the serious erosion of the cartridge case, and often, the inability of the weapon to function properly thereafter. Thus, this failure may result in serious harm to the rifleman and damage the weapon....

...it was found that ... a four thousands deep longitudinal scratch would, upon firing, result in "burn-through".

There are several reports on this from the 1950s through the 1970 with numerous pictures of M14s, M60s and M16 wrecked by melted aluminum case heads.

Many solutions have been proposed, from plastic inserts to special coatings, but these result in the loss on internal volume and reduced ballistic performance.

Other than the giant 30mm and 35mm cases, the military has given up on that line.

 

Those look like brass from proof rounds.

 

It’s nickel plated( takes some work to get it to shine) friend of mine that has a reman ammo business buys a lot of LC surplus. He told me it was for LC proof loads . I picked up some from sages , it virgin brass .

 

I can't imagine people shooting proof rounds one right after the other at the range. On the box they are usually marked as dangerous. I'm guessing they were newbies and got the ammo from some idiot that took them out of the box. I know they're military but they should still be stamped "proof", someone could've got hurt. Safety second or third lol.
m14brian

 

They were very sold as proof rds . There was a large surplus of LC 17 nickel brass that was sold to the civilian/surplus market. Not sure if this brass was out of spec/didn’t meet all the QC requirements or just excess??? I know that On target ammo was selling 223/5:56 loaded in these cases earlier this year . I believe they stopped because it was to labor intensive to polish cases etc . The virgin brass before polishing looks like kinda like it’s galvanized . That’s also why sages reloading sold it so cheap

 

Winchester tried pushing nickel plated 223 some time ago,
Looks like lake city just did not polish their brass.

I dont really get the nickel plate , more expensive , more work and in the end why, other than hunting rounds that may take 30 years to shoot 20 rounds!

If its cheap enough I dont care but im,not paying more for bulk LC because Nickel.


If any of you shoot 762x39 or steel cased ammo , have you seen the zinc plated bullets and cases.
[ame="https://www.youtube.com/watch?v=OmJLc4Tqbhs"]Tulammo changed bullet and powder ? - YouTube[/ame]

 

I dont really get the nickel plate , more expensive , more work and in the end why, other than hunting rounds that may take 30 years to shoot 20 rounds!

Theoretically, it's for better cycling and chambering. Hornady puts their defensive ammos in nickle brass... and, for a while, they even put their TAP (tacticool ammo) in blacked-out nickle brass.

 

Must have worked super good as its the stuff to have now .....sarcasim meter high emoji here.
Hornady also put out steel cased match ammo?
does not seem to be that much of advantage over all.
Yeah maybe for carry pistols where your ammo might not circulate much.
I did buy a revolver where the cases had "tarnished" themselves tight into the cylinders. All the rounds went bang which made tapping the stuck brass out much easier.

Plus the Zinc plated steel stuff thats out there.