Good call on culling the deap ones!
The old lot(back in the late 80s early 90s) Had primer pockets the where WAY off center and didnt even work well for varminting. I scrapped all my PMC brass years ago.
A little while ago however I found a large # of 223 brass at the range someone had left. Most of it was PMC and looked good enough to mess with=so I did :-) However in sorting out brass some of that old lot must still be around because I found 2 and rechecked EVERYTHING again before proceeding.Now I have 110 cases of sorted 223 brass that is working great for target work!