“Wiped Cam Reveal”

I have been running Hot Cams in my 340 with appropriate springs for 40 years and have swiped one lobe in all that time, that valve also had a broken dampener spring and I believe a piece of the spring may have stopped the lifter rotation. But I can't be sure which happened first the spring breaking or the Lobe swipe . I was also able to catch what looked to me as a bad wear pattern beginning on my current cam early and by swapped out the lifter and have had no further problems. All of my camshafts have either been crane or purple cams. And I think the Mopar performance lifters hydraulics are very good pieces.