340 Lifter failure, now what

I have a set of Comp 821-16 lifters that look pretty good. Not much to go wrong with them and they look like they use a quality snap ring for the insert. Based on previous posts regarding lifter quality, I've checked them on my granite plate with a test indicator to evaluate the radius, at least to verify it is there and fairly consistent. Without an electronic test indicator that will record as you go or a coordinate measuring device, actually mapping the profile on each would be difficult and time consuming. I'm satisfied with what I have seen. If I had any concern about it, I'd send them out to be reground before I install them. I think that Rocker Arms Unlimited does it for pretty reasonable cost.