Yours is an excellent question! To which I would reply, "yes and no"! The coating will often permit a reloader to achieve higher velocities with lower pressures than if using a plain, uncoated bullet. On the other hand, IN SOME BARRELS, the coating material has built up, and caused a loss of accuracy. In such barrels, the coating material is also the very devil to get out so the barrel can be restored to original condition.

The only experience I have personally had with coated bullets was with cast bullets using a paint-on lubricant containing MoS2 that dried on the bullet after you painted it on. (Master Lube or something like that.) The stuff degraded the accuracy of my Ruger No. 3 .30/40 Krag, and it took a real effort to scrubit all out of the bore and finally restore the gun's accuracy. The gun shot poorly for about a year, but is now back to normal. It also affected the accuracy of jacketed bullet loads Ifired in the gun after shooting the cast bullets. But, for some reason, the stuff worked real well when painted on Minie balls and other conicals fired in rifle muzzleloaderswith black powder.The stuff I used contained MoS2. I believe Lee makes a paint-on lube that works pretty much the same way, but is alox-based rather than containing MoS2. There is also the blue stuff on some of the Barnes X bullets. I don't know what that stuff is.