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  #1  
Old 03-24-2017, 06:26 PM
charlesasmith charlesasmith is offline
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Default HBN coating - What am I doing wrong?

Switched from a rotary tumbler to a vibrator as I couldn't get a proper impact coating. 1st time with the vibrator tumbler had success using 250 old 17 cal Hornady 25 gr HP. All I did was rinse the bullets in alcohol, dry, and vibrate for 4 hours. Everything since then has not worked with newer & fewer bullets. I am not using heat and tried rinsing in acetone to no avail.

Any suggestions?

Chuck
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  #2  
Old 03-24-2017, 09:02 PM
Chickenthief Chickenthief is offline
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It is the mass of bullets that pound it into the surface.
Thats why rotary tumbling works with any amount of bullets.

So few bullets just dont do it, use a pound of ball bearings in the vibratory tumbler and you're in the game again.
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Old 03-24-2017, 10:08 PM
charlesasmith charlesasmith is offline
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Default Tumbling with HBN

Thanks Chicken Thief.

Use about 1# of stainless BBs. May be using too much HBN?

Chuck
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  #4  
Old 03-25-2017, 01:22 PM
DAA DAA is offline
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I do use heat. Not sure if it's needed, or what the problem for you is. But as described, it's the only difference I can see.

- DAA
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Old 03-25-2017, 02:36 PM
DAA DAA is offline
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Oops. I'm using Ws2 not HBN. Sorry about that.

- DAA
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  #6  
Old 03-25-2017, 05:02 PM
coyotezapper coyotezapper is offline
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I use 4-5 different sizes of media - pins and ball bearings. I wash the bullets, dry them and then heat them - 200*. I then put them in pill bottle with media along with about 1/10 teaspoon of HBN. I then vibrate tumble in empty tumbler for 4-6 hours. This is for a batch of 200 17 caliber bullets. I only coat 17 caliber bullets. The pill bottle should spin when vibrating.
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  #7  
Old 03-28-2017, 02:55 PM
GrocMax GrocMax is offline
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For bullet only hBN in a vibratory you need to use 500-1000 bullets at a time, can mix bullets of various calibers/weights that can be easily sorted afterwards. Heat lamp helps I rarely need to go more than 45 min.

New bullets need no prep they are clean. Be careful about introducing any chemical into a plastic bowl that can make the plastic transfer to the surface of the bullet. Once your bowl is coated in hBN and 'sealed', use this bowl for hBN ONLY.
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