High quality lifters???

I Didn´t mean "holes", maybe craters is more presice word for what I mean. Maybe the material has been porous or something, anyway those are defenetly something that is not ment to be there. The contactarea between lifter and lobe is small and the loads(?) are high, + I have extreme energy cam, which causes even higher loads. I Don´t want to grind my new cam, have anyone experience about this type of problem(is it a problem at all?)??? Knowledge increases pain?!