HbN coating, black copper

[RTG22]

Hello fellow shooter,

I coat my bullets with hexagon boron nitride. Today I saw that the copper jackets (Lapua scenar l) turned black. I think the air was to moist and colored the copper black...I tried but I cannot rub it off with a towel or microfiber cloth.

Can I still use the bullets or can I better throw them away? I just coated 2/300 bullets that all turned black. 1000 bullets costs in Europe 460 usd, it it only where 50 bullets i would throw them away for sure.

Kind regards,

 

[Supersubes]

What are they supposed to look like?

 

[Powder_Burns]

Just shoot em. Looks like the coating reacted to the moisture in the air.
If you gotta have shiny jackets, try soaking them in water with a little citric acid solution.

 

[RTG22]

just like copper but then dull like stained glass (left op picture, right is without coating).

 

[RTG22]

Just shoot em. Looks like the coating reacted to the moisture in the air.
If you gotta have shiny jackets, try soaking them in water with a little citric acid solution.

Thanks! I don’t care about the color, even if they where pink with purple dots. I only want the same accuracy and them not to wear my barrel More out than uncoated bullets,

 

[want2learn]

take a look at this article on accurate shooter:

Boron Nitride Sources and Application Procedures « Daily Bulletin

Hexagonal Boron Nitride (HBN) is an advanced bullet-coating material. HBN, also known as ‘White Graphite’, has similar (hexagonal) crystal structure as graphite, though it is a much better lubricant.

bulletin.accurateshooter.com

 

[Powder_Burns]

Learn something new everyday. Good article, I’ve only seen moly treated bullets.

 

[Go Cougs]

I’ve had the same thing happen. Didn’t see any I’ll effect on performance.
Send them!!!

 

[RTG22]

@want2learn. Thx but the black ones are moly coated.

@all, thank for all the replies!

 

[smoothy8500]

Thx but the black ones are moly coated.

Stick with Hbn, performance is somewhat better and less toxic than moly (and cleaner too).

 

[want2learn]

I would suggest using a N95 mask with all very fine powders......can't hurt to be extra careful.

 

[Conrad]

Do they still feel slick? How do the seat in a case? How do they pull out of a case, worth testing...

 

[NamibHunter]

I use the David Tubb HBN kit and it works well.

Same thing happened to me when i left a 100 bullets in the plastic tumbling bottle for a few days without cleaning off the excess. Pretty sure it is the copper anti-fouling agent that Mr. Tubb adds (which i am pretty sure is also the source of the ammonia smell when you open the bottle after tumbling). The coated bullets all had dark blue / black corrosion marks on the copper jacket.

Rubbed the bullets down, then tumbled them a second time. They shot ok, same/similar speed and adequate accuracy. Speed of this batch was a little different (30 fps lower) compared to normal speed, but SD was good enough (9 fps).

 

[NamibHunter]

Only time i have had issues with HBN coated bullets not shooting well, was when i mixed the left-over twice tumbled (corroded) bullets mentioned above with correctly coated bullets (white milky color) in the same batch of hand-loaded ammo. SD went from 8 to 14.5 fps, and ES went straight up to 56 fps.

Did not shoot good groups that day. But this problem is easily avoided!

 

[Hegre]

Hello fellow shooter,

I coat my bullets with hexagon boron nitride. Today I saw that the copper jackets (Lapua scenar l) turned black. I think the air was to moist and colored the copper black...I tried but I cannot rub it off with a towel or microfiber cloth.

Can I still use the bullets or can I better throw them away? I just coated 2/300 bullets that all turned black. 1000 bullets costs in Europe 460 usd, it it only where 50 bullets i would throw them away for sure.

Kind regards,

How do you order the hex boron kit in Europe? Seems bullletcoating.com and Tubbs will not ship.

 

[RTG22]

I don’t have the Tubbs kit, I just bought a jar of HbN. You can impact plate with steel BB’s or bearings, I even did it with stainless steel tumbling media (jewlers shot).

On eBay you can buy HbN from Microlubrol And a lot of other brands. Just search on HbN, If I search for hex’s boron nitride I don’t find it. Just look for the correct particle size. I personally use HbN from lower friction. It has a particle size of .50micron