HBN question

[Boyd Allen]

What do you think would happen if you put a very small, measured, amount of HBN on top of your powder charge, before seating bullets?

 

[David Halblom]

yo would need to find out what the "melt" temp

What do you think would happen if you put a very small, measured, amount of HBN on top of your powder charge, before seating bullets?

of HBN is. Remember, the temps inside the case are approaching plasma levels, albeit for micro seconds. HBN is a refractory produced product. But dealing with as fine a powder as HBN is, I would think that that is enough time for at least part of the HBN to vaporize and then maybe re-deposit SOMEWHERE inside the barrel. But where? And at what crystal size and configuration?

I believe you can get this data off the web. The GE website used to have a data page on all the various forms of HBN

FWIW

David

 

[alinwa]

I'm no rocket scientist but Harold Vaughn tested it using moly and you know what he found

al

 

[Boyd Allen]

The thought is that the HBN would be disbursed down the bore, and end up reducing the tendency for fouling to stick to it. I realize that putting it behind bullets would mean that for a few shots, there would be little protection, but nevertheless, I don't see where there would be much harm in doing a little experiment, on an old barrel, looking at fouling rates, and velocity over a number of shots. Perhaps clean barrels could be prepped with a HBN and alcohol mixture using a bore swab. Currently there is a powder that reduces copper fouling. I was just thinking that perhaps there is not so much of a need for such a modifier to be uniformly mixed. Was it Edison who said something about invention being 1% inspiration, and 99% perspiration? Sometimes when I try off the wall stuff, it works, and a lot of the time it doesn't. I still enjoy trying.

 

[jim1K]

Boyd, I tried HBN coating bullets, and found no benefit from it. I even tried it on leather bags and found no benefit. I think i have some if you need to waste some time…… jim

 

[R.G. Robinett]

The thought is that the HBN would be disbursed down the bore, and end up reducing the tendency for fouling to stick to it. I realize that putting it behind bullets would mean that for a few shots, there would be little protection, but nevertheless, I don't see where there would be much harm in doing a little experiment, on an old barrel, looking at fouling rates, and velocity over a number of shots. Perhaps clean barrels could be prepped with a HBN and alcohol mixture using a bore swab. Currently there is a powder that reduces copper fouling. I was just thinking that perhaps there is not so much of a need for such a modifier to be uniformly mixed. Was it Edison who said something about invention being 1% inspiration, and 99% perspiration? Sometimes when I try off the wall stuff, it works, and a lot of the time it doesn't. I still enjoy trying.

Many moons ago, Jerry Hensler did a great deal of "like" experimenting - with molybdenum-disulfide - though they may not credit him, it is not unlikely that the CFE powder is an off-shoot of Jerry's work . . . Having said that, it (the ingredient) could be "something different", but, likely, the same concept. RG

 

[Boyd Allen]

Oh well! http://www.youtube.com/watch?v=rY0WxgSXdEE

 

[Lee Martin]

Interesting idea. I get the concept and would be curious to know how it plays out (if at all). And I assume the goal here is to reduce the amount of bronze brushing?

-Lee
www.singleactions.com

 

[Boyd Allen]

My thought was that it might reduce hard carbon deposits, and increase the number of shots before accuracy begins to fall off slightly.

 

[jim1K]

Boyd, It is easy to put on your bullets, with a vibrater and bb's but i never could see any advantage. Never shot better and it didn't clean better maybe a little harder because of how you have to clean with it. I have some if you care to try it…….. jim

 

[Boyd Allen]

Perhaps the best option of all was to ask here, pay attention, and skip it altogether.

 

[jim1K]

Boyd, Yes, it was cheaper than the route i went. I just had to see, but don't get me wrong it may or may not work a little….. maybe…….jim

 

[John Kielly]

Boyd,

Recently a few of us locally have come to the conclusion that apart from making cleaning easier, HBN coated projectiles don't have any positive or negative effect. The velocities achieved, coated or uncoated are similar, as opposed to molybdenum, which does change the friction coefficient of coated projectiles.

I've used it for two applications (neither centrefire benchrest). In one case, accuracy & consistency was very acceptable; in the other, it was rubbish.

John

 

[afrench]

yeah, it's pretty terrible stuff.

if anyone is tired of looking at that HBN, just send it to me and i'll dispose of it properly...