The following steps show how bullets can be coated be projectiles coated with boron nitride BORO-SHOTS SF4:

1. Clean bullets thoroughly with acteone in order to remove dirt and grease from deep drawing.

2. Tumble bullets for 3 hours with steel balls (3.2mm∅) with addition of 3 grains (200mg) BORO-SHOTS SF4, then sieve.


Bullets are tumbled with 3mm steel balls in boron nitride BORO-SHOTS SF4.

3. Tumble bullets with fresh corn cop for 5 minutes, then sieve. The bullets look like having a dust of sugar.


Corn cop for tumbling bullets.

4. Bullets should be wiped clean using a soft cloth, the projectiles have a nearly transparent layer of BORO-SHOTS SF4 with a light, silky shine on.


Bullets, coated with boron nitride BORO-SHOTS SF4.


Bullets coated with Boron nitride BORO-SHOTS SF4, right out of the tumbler.( 330grs. Leheigh-Match) (Leheigh compared to raw Cal.50BMG Match projectile). It turns out that, compared to normal mantle bullets you have just to work a little longer with the steel balls + ca 30min.

These bullets are not "polished", after cleaning the surface of the granules is then identical to a normal jacketed bullet.

As it stands, SOLID-hunting bullets can be coated easily too, like Barnes X, oder JAGUAR classic.

Photo: M.G.Uekötter

© 2018 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst

These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.

 Boron-Nitride-Powder for Bullet Coating




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