Mild 440 break in springs?

I've been using an old set of factory red Magnums for the last few hyd and solid flat tappet cam break-ins on my test stand and there have been no issues. Of course I even use used head gaskets for break-in and testing. I like to to tear down and inspect after first run-in and then re-assemble with the new gaskets and actual springs and run one more time on the stand for a bit before I install in the car, but maybe that's just me.