and accuracy was even better. Generally, where the ideal com-
bination with naked bullets requires a case full of one type of propellant, when switching to the use of moly-plated bul- lets the easiest approach is to switch to a faster propellant. Alternatively, use the swirl-charge technique to allow use of a heavier charge of the same propellant, if that does not drive pressure too high. ProPerly Moly Plating Bullets Assuming that one begins with
quality moly (which many shooters have failed to do), proper plating de- pends upon one factor more than any other – clean bullets! Hydrocarbons (oil, grease, wax,
etc.) prevent moly from adhering to bullets. Technically, hydrocarbons wet the bullet better than moly does and therefore moly cannot displace hydro- carbons from the bullet surface. So, any proper plating process must begin with clean bullets. Those who have tried to plate bullets having a waxed or oiled surface have seen the resulting black bullet. The moly adhering to such a bul- let has a dull, flat-black appearance and is easily rubbed off. Such a bullet is not plated; the moly is merely coating the oil. Adhesion is inadequate to offer any protection against bore fouling. Through the years, I wrote about
moly plating every time I found a better method (many of those articles published in PS). This time I found a monumentally better way. Hereto- fore, results of using my (then) newest method always seemed to be better but, beyond simple subjective opinion, I never was certain how I might be able to prove that the results actually were superior. This newest plating method is so much better that results are markedly and obviously superior. The resulting plating is so slick
that 22-caliber and smaller bullets are actually quite difficult to pick up. More- over, this plating is so dense and so du- rable that it is difficult to wear through it with normal handing. Furthermore, it would seem this process essentially eliminates the need to finish bullets with a wax coating (a complicated, difficult, and time-consuming process). A slicker bullet is beneficial to-
ward reducing fouling; it can pass through the bore with less friction and therefore with less heating and less abra- sion. Friction and heating contribute
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to bullet abrasion and bore corrosion; bullet abrasion also exposes gilding metal that is either directly deposited onto the bore interior or is abraded into the propellant cloud where it can first vaporize and then condense onto cooler bore surfaces (usually in the bottom of the grooves near the muzzle). This bullet damage also degrades
accuracy and contributes to bullet fail- ures. Often, when pushing bullets hard, we find that by moly plating we can use loads generating several hundred fps greater velocity before accuracy degrades or bullets begin to fail on the way to the target. Denser moly plating can better
prevent gilding metal from coming into contact with the bore interior. This will reduce metallic bore fouling. Moly Plating, ConCePt Molybdenum disulfide is phenom-
enally slick, relatively inert, nontoxic, will withstand a differential stress of 400,000 psi, and will tolerate higher temperature than is ever found on the frictional surface of a bullet passing through a rifle bore. It also has a natural affinity for many materials, including
metals – moly will tend to stick to any clean surface. On a clean bullet, impact plating,
using some type of tumbler, does the needed job (a rotary tumbler, such as is sold by RCBS, is ideal). I typically tumble flat-point, hollow-point, and hard-tipped bullets for about four hours. With bullets that are lighter than
about 100 grains, tumbling longer seems harmless. Conversely, extended tumbling can damage the nose (exposed lead) of conventional spitzer and round- nose jacketed bullets, can damage any sharp edge of relatively soft cast bullets, and can deform the tips of heavy match hollow-point bullets. This is progres- sively an issue with bullets heavier than about 100 grains – the heavier the bul- let, the harder it must be to withstand extended tumbling without damage. For most varmint bullets, tumbling damage never is an issue. Crux of the Matter
When I started plating bullets, I
followed the advice of Roger Johnston, an early modern advocate of moly. I tumbled bullets for several hours in corncob medium. This process mechani-
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