Applying Hbn?

[in2deep]

Is there a method of applying Hbn to bullets that coats them effectively but that does not deform the tips?
Also I abused my body as a youngster chain-smoking and working with furniture stripper and would not be able to work with anything that is a lung irritant if that is an issue with the stuff.
Thanks.

 

[mc223]

I use pill bottles of small quantities of bullets and small quantities of HBN in a vibratory tumbler. No BBs. Less nose dings with the vibe. But I also trim and point my bullets prior to coating. The vibe tumbler takes longer.
I also use a Thumlers for larger quantities with BBs for less time. At least the nose dings are uniform.
I also try not to get dust in the air as much as possible, not because of sensitivity but because I do my bullet coating in the house an the woman gets well you know.


Here is a link to an article on this site.
http://bulletin.accurateshooter.com/2010/01/boron-nitride-application-procedures-for-bullet-coating/

 

[kelbro]

I use a vitamin bottle filled about 1/3 with BBs in a vibratory tumbler. The bottle does not tumble, just vibrates. No point damage. No lung irritation.

 

[ar15topgun]

wear a resprirator when handling the hbn especially when seperating the bullets from the bb's.

 

[JRS]

If you'll use ceramic media rather than steel shot, you won't have to be concerned about the miniscule amount of damage that might be caused during the tumbling process. To get a good even coating, a tumbler is by far the best means to apply the hBN. You don't have to be concerned about wearing a respirator. NO evidence exists that hBN, boric acid, or boric oxide are carcinogens or pose any toxic hazard. I should add, my experience includes using, selling and having had a chemist formulate an optimum size of hBN for coating bullets. If one feels better by wearing a respirator, the P100 is the best bet, and can be used time and time again.

 

[hoverp]

what ceramic media?

 

[JRS]

There are many manufactures and suppliers. I purchased mine from Kramer Industries. They were recommended to me by ROBAR.

Hope this helps.

Richard

 

[hawghunter]

JRS what size and shape do you use went to web site but to many choices or do you have a part number thanks Mark

 

[mc223]

Is there supposed to be some advantage to adding an abrasive ingredient to the process?

 

[btm_54]

Hope this helps.
http://www.accurateshooter.com/forum/index.php/topic,3741653.0.html

 

[JRS]

i replied to your email Mark.

An abrasive will remove the Boron.

 

[mc223]

So I put my bullets in a bottle with HBN to coat them, and add ceramic media

An abrasive will remove the Boron

.


Well Duh I just dont get it.

 

[JRS]

So I put my bullets in a bottle with HBN to coat them, and add ceramic media

An abrasive will remove the Boron

.


Well Duh I just dont get it.

The ceramic media is not an abrasive. You are applying the Boron via impact plating with the media.

 

[mc223]

Excerpt from Kramer Industries website page about ceramic media.

http://www.kramerindustriesonline.com/tumbling-media/ceramic-media.htm

Ceramic finishing media is made of silica and other minerals and abrasives that are combined, formed and fired at a high temperature, producing a very hard, cement-like product.

JRS :

The ceramic media is not an abrasive

I'm thinkin that just using steel shot or BBs will be a better way than the introduction of an abrasive to something that you are sending down the barrel at high temp and pressure.

 

[jo191145]

Why not just simplify the whole process and eliminate the media entirely.
Its not required.

 

[JRS]

Excerpt from Kramer Industries website page about ceramic media.

http://www.kramerindustriesonline.com/tumbling-media/ceramic-media.htm

Ceramic finishing media is made of silica and other minerals and abrasives that are combined, formed and fired at a high temperature, producing a very hard, cement-like product.

JRS :

The ceramic media is not an abrasive

I'm thinkin that just using steel shot or BBs will be a better way than the introduction of an abrasive to something that you are sending down the barrel at high temp and pressure.

Yes, the media is made with abrasive material added. However, as the above states, it's as hard as a rock. Abrasive it is not. Do you know what hBN contains? Media such as this is used on a daily basis to polish jewelry. I have been using ceramic media and hBN since before it started to become such a household name. Steel shot works well also. My preference is to use ceramic. Take a good look at a ceramic knife blade if you get the chance. You won't find a blade much smoother. It too is made with abrasives, but the finished product is not abrasive.

 

[zfk55]

I don't agree, Joe.
We've been using hBN impact coated projectiles through treated bores for better than 22 months now, and the difference with and without is highly discernable using the Hawkeye Borescope and two control rifles, those being Swiss k31s.
We have a number of barrels extremely difficult to replace and a couple nearly impossible to replace, and if we're doubling and even tripling barrel life, then its definitely worth it.

zfk55

 

[zfk55]

I should mention that there are now some 23 rifles here in varying calibers that are all treated and fire only hBN coated projectiles. Once you understand the process and don't vary from it you get outstanding results. The proof is in the borescope. 420 .30 caliber shots through the control rifle thus far and literally no copper trace at all.

 

[JRS]

This might convey a better understanding as to abrasive:
The barrel that bullet travels through would be abrasive if not lapped to the nice finish our wonderful barrel makers employ. The copper jacket on the bullet contains abrasives, yet in it's final state, is not abrasive. Media, steel shot, SS shot, ceramic, walnut hulls, etc, etc, etc, are abrasive depending upon their use. If they are used as a blasting media, they are then abrasive. In their hard and final state used as a polishing or plating media, they are then not abrasive. We use a pretty abrasive compound (toothpaste) every day. Yet if we do our part, we aren't damaging our teeth and gums. It depends upon how the abrasive containing materials are put to use.

 

[mc223]

I think I'll just not use the ceramics as a replacement for good ole BBs. I would also advise others not to use the ceramics in the process of impact plating bullets with HBN.