Moly Coating - Berger Bullets

This is the third in a short series of articles about moly-coating. The series covers technical and practical aspects of moly-coating. This article was written by Berger Bullets and describes their coating process.  I believe Berger no longer offers coated bullets, but that doesn't diminish the usefulness of the article - in fact, it makes it more valuable.  If you are interested in moly-coating, I strongly recommend the NECO process and materials. http://www.neconos.com/

Official Berger Bullets Moly Coating Process
Berger Bullets,4275 N. Palm St.,Fullerton, CA 92835
(714) 447-5456 - Phone
(714) 447-5478 - Fax


The following is a detailed list of instructions describing how Berger Bullets moly coats their bullets. This process should not be done in your living room. Moly is washable with soap and water but the amount of moly that can distribute itself around the area where you moly can make a bit of a mess.

Materials Needed:
  • RCBS Sidewinder Tumblers (2 drums for each drive motor platform)
  • Molybdenum Disulfide (finest micron size available and from hereon referred to as moly)
  • Carnuba Wax (powder form)
  • Scale That Weighs in Grains (2 trays needed, one for moly and one for wax)
  • Terrycloth Bath Towel (consider using one will not be needed in your bathroom again)
  • ½ Gallon Bucket
  • Timer capable of 2 Hours
  • Sharpie Marker
Material Sources:

RCBS – http://www.rcbs.com/

The Sidewinders are available through many dealers who specialize in reloading products. Grain weighing scales are also available through many dealers. The accuracy of the weight of materials used is not ultra critical so less expensive scales can be used.
NECO – http://www.neconos.com/
NECO sells the moly and carnuba wax regularly. These items are available through others sources but can be difficult to locate consistently.

The ½ gallon bucket can be replaced by anything with similar capacity like a tumbler drinking cup or butter dish. The goal is to have something that will allow you to gently pour the bullets into the tumbler drums.

Moly Coating Procedure:

Note: Bullets must be completely clean for the process to work properly. Our bullets will arrive clean but some brands are not completely clean. To insure cleanliness wash your bullets in lacquer thinner containing minimal petroleum products or use acetone. Make sure the bullets are completely dry either by laying them in the sun or heating them up with a blow dryer. Fluid can stay in the hollow point area of the bullets and should be quickly evaporated away rather than allowed to dry slowly indoors.
Also, steel balls are not needed to moly coating your bullets. It is very important that two drums are used and that one is always used for moly only and the other is always used for wax only. Mixing this process in both drums will ruin your ability to coat properly and a thorough cleaning (which doesn’t always work) or replacement drums will be required to correct this particular result. To avoid mixing these drums use a sharpie marker to clearly label one drum for MOLY and the other for WAX.
Using this process you can coat from 1 pound of bullets up to 15 pounds. Bullets of different sizes can be mixed and tumbled together if you want to coat many small quantities in fewer cycles.

1. Put the clean bullets into a ½ gallon bucket (or similar container).

2. Pour the bullets gently into the drum marked MOLY.

3. Measure the moly using the grain weight scale and the moly tray (squares of plastic will work but are harder to manipulate without spilling).

a. Use 30 grains of moly plus 1 grain for each pound of bullets

i. Example: 5 pounds of bullets require 35 grains of moly

ii. Example: 12 pounds of bullets require 42 grains of moly

4. Put the moly into the drum marked MOLY with the bullets.

5. Tumble the bullets for 2 hours.

6. Pour the bullets onto a large terry cloth bath towel.

7. Grabbing the ends of the towel with each hand alternate pulling each end of the towel up allowing the bullets to tumble back and forth inside the towel. Do this 20 times or so until all the excess moly has been removed from the bullets. You should not see any clumping or excessive powder on the bullets.

8. Transfer the bullets from the towel into the ½ gallon bucket. There are a few ways to do this without getting your hands dirty but they are difficult to describe. Try a few different techniques until you find one that works for you. (Think: pouring them out of the towel)

9. Pour the bullets gently into the drum marked WAX.

10. Measure the carnuba wax using the grain scale and the wax tray (squares of plastic will work but are harder to manipulate without spilling).

a. 1 to 3 lbs of bullets use 0.1 grains of wax

b. 4 to 7 lbs of bullets use 0.3 grains of wax

c. 8 to 12 lbs of bullets use 0.6 grains of wax

d. 13 to 15 lbs of bullets use 1.0 grains of wax

i. When you use the WAX drum for the first time double the wax needed.

11. Pour the carnuba wax into the drum marked WAX with the bullets.

12. Tumble the bullets for 15 minutes.

13. Empty the bullets into any container. They are ready to shoot.

a. In some cases excess wax will appear as clumping. This can be reduced slightly by following step 7 (make sure you use a different towel). Once your drums are used a few times you should not see clumping after the wax process.
There are other ways moly can be applied but the above is how we do it at Berger Bullets.
 

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