Can you tell me what this is?

[Hockey7711]

What is on the back of these 9mm bullets?

 

[fxvr5]

copper plating. they are plated bullets.

what brand are they?

 

[Hockey7711]

There is a pink substance on the bases . I'll try to get a clearer picture...

 

[Hockey7711]

 

[fxvr5]

can't see it.

 

[Hockey7711]

 

[fxvr5]

looks yellow. does the pink wipe off? you might have to tell us what the pink color is if the pictures can't get better.

what brand are the bullets? where did you get them?

 

[higgite]

Do you have a whole batch of bullets with pink on the bottom or just the two in the pic? Again, what brand and where from? Do you have any previous bullets from the same source to compare?

 

[KYregular]

looks kind of dome or convex shaped on the bottom, am I correct?

 

[Bronco72]

Quality Control lady giving kiss of approval

 

[243winxb]

Looks like a cap or seal to make the bullets "Lead Free". Total Metal Jacket (TMJ) My guess.

Could be a short gas checks swaged to the base or Hi-Tek coating,,if possible?

 

[KYregular]

Definitely look like plated bullets, OP give us a brand please. My guess is that is a mess up from the plating process. Would NOT load them until you find out.

 

[ATCDoktor]

I believe those are Streak AMMO projectiles that were sold as components.

For those that are unfamiliar, Streak Ammo is a non incendiary "cold" tracer technology that's been on the market for several years:

Streak • Ammo Inc

STREAK's patented, non-incendiary technology for indoor range use and low light shooting allows the shooter to see their bullet's path.

ammoinc.com

Where'd you get them?

 

[lordpaxman]

Veeerrrryyy Interesting! I’ve not seen that before. Did you pull these or are they offered as just bullets?

 

[rfwobbly]

When the copper alloy gets chemically altered by the introduction of a foreign substance (typically an acid), the exterior color of the metal changes. This is only a surface phenomena and the metal is not altered, weakened, or otherwise hurt. You can prove this to yourself by applying a tiny bit of copper/brass polish to one of your pink bullets.

For instance the rinse water from local sources could have a mineral in it that, if left on the bullet to dry, could do this. It's a non-issue.

I also work on antique clocks. You can see the same "pinkish/reddish trace" in the center of this brass clock bob. At some point someone had a foreign substance on their thumb (salty perspiration ?), touched the brass, and the brass got dis-colored in that one region. It was thoroughly removed with 5 seconds of brass polish.

 

[Akula69]

It is the Streak "tracer" round. They have been offered at American Reloading for some time in bulk. The link below is for the .45 cal FMJ (and they are out-of-stock, before someone chimes in)

Streak Ammo

 

[Hockey7711]

I don't know the brand, I have several of them which came in an order of mixed pulled bullets from American reloading. Yes it is plated. I suspect it's some kind of tracer round. The pink area is rounded and solid. It does not rub off.

 

[ms6852]

Copper can turn pink when it is heated or exposed to some kind of acid.

 

[Englishmn]

Hit it with a light and see if it glows in the dark.