How do you prevent distributor gear wear on a steel billet solid roller camshaft?

On my 14-71 blown big block chevy the MSD "brass" distributor gear wore out in about a thousand miles running on a fairly mild howards solid roller cam. Next I tried the "melonized" gear, it also started wearing after about 1k miles, next I tried the "plastic" one that comp cams claimed would work, but it only lasted about 1500 miles before 1/2 of each tooth was worn off and had significant spark scatter. I then installed a Crower billet roller cam with a cast iron gear pressed on and after 10K miles the stock GM distributor gear looked basically like new.