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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
HBN Bullet Coating
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<blockquote data-quote="Dirtrax" data-source="post: 2733803" data-attributes="member: 78945"><p>What was old is new again…</p><p>Ultra Fine/sub micron hBN is widely available and it's cheap. </p><p>To apply to bullets simply tumble in a rotary or vibratory tumbler. I use a vibratory tumbler and it takes about an hour. Place the bullets in a plastic container such as a pill bottle or a larger pain reliever container. Dosing varies depending on whether it's a new container or old, but somewhere around 1/4-1/2 teaspoon will get you started. Once an hour or so has passed remove the container and gently dump the contents (leaving loose hBN in the container) into a sock and remove the excess. The result should be a milky white bullet. They will be slick. </p><p>For barrel pre-treat I use 99.9% IPA (again cheap on Amazon) and add hBN until I get a milk like slurry. I then use a sponge produced by "Bore Tips" to swab the bore. A wetted patch will work. Draw the cleaning rod back and forth until full coverage is attained. *CAUTION* Pressure will spike for the first few shots. I'm usually fine after 3 rounds. Pretreatment isn't necessary as multiple rounds will coat the barrel. Clean up is standard although copper fouling should be minimal. I do suggest cleaning to bare metal prior to the first application. </p><p>I know I wrote a novelette but if you consider the timing of the steps it adds very little to the process. Clean up is SO much quicker that you get it back many times over. </p><p>Pressure is reduced so an adjustment in powder charge may be required. The bigger the bore the greater the effect on pressure.</p></blockquote><p></p>
[QUOTE="Dirtrax, post: 2733803, member: 78945"] What was old is new again… Ultra Fine/sub micron hBN is widely available and it’s cheap. To apply to bullets simply tumble in a rotary or vibratory tumbler. I use a vibratory tumbler and it takes about an hour. Place the bullets in a plastic container such as a pill bottle or a larger pain reliever container. Dosing varies depending on whether it’s a new container or old, but somewhere around 1/4-1/2 teaspoon will get you started. Once an hour or so has passed remove the container and gently dump the contents (leaving loose hBN in the container) into a sock and remove the excess. The result should be a milky white bullet. They will be slick. For barrel pre-treat I use 99.9% IPA (again cheap on Amazon) and add hBN until I get a milk like slurry. I then use a sponge produced by “Bore Tips” to swab the bore. A wetted patch will work. Draw the cleaning rod back and forth until full coverage is attained. *CAUTION* Pressure will spike for the first few shots. I’m usually fine after 3 rounds. Pretreatment isn’t necessary as multiple rounds will coat the barrel. Clean up is standard although copper fouling should be minimal. I do suggest cleaning to bare metal prior to the first application. I know I wrote a novelette but if you consider the timing of the steps it adds very little to the process. Clean up is SO much quicker that you get it back many times over. Pressure is reduced so an adjustment in powder charge may be required. The bigger the bore the greater the effect on pressure. [/QUOTE]
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HBN Bullet Coating
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