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Are Moly coated bullets really faster? Featured science projectScience project video


This science fair project aims to find out how the velocity of the bullets is affected by coating them with dry lubricants. The tests will be carried out using a rifle and bullets coated with molybdenum sulfide (moly).


Moly-coated bullets will travel faster than ordinary bullets?

Scientific Terms

Lubricants, Molybdenum sulfide, Hexagonal Boron Nitride, Tungsten disulfide, friction, pressure, velocity


Molybdenum Sulfide (Moly) coated bullets

Bullets have along been coated with dry lubricants in order to improve their velocity. In particular the availability of of such ready-coated bullets  has  increased their popularity. There are 3 types of coating typically used on bullets, namely  Molybdenum disulfide (Moly), Hexagonal Boron Nitride and Tungsten disulfide. Moly is  the most common type of bullet coating used in firearms  However moly can cause erosion of the gun’s barrel because it reacts with moisture to produce harmful substances.


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Complexity level:
Project cost ($):
Time required:
1 hour for preparation, 1 day for observation
Material availability:
Procurement of licensed firearms from authorized sources required
Safety concerns:

1.    Unauthorized use of firearms is illegal. Some countries carry extremely heavy penalties for the illegal possession or use of firearms.
2.    Ensure that only a trained and authorized/licensed person  is allowed to handle the firearm.
3.    The tests must be conducted in a safe environment - eg a proper shooting range.