JB,
I've not had any problems with WSR primers; had multiple pinholes with WLR primers, and one failure with WLP primers. I've read about other folks here having the same problem and knew you were keeping a list of lot numbers that were suspect, so I put all my Winchester primers (about 5,000) in a five gallon bucket filled with oil. Put the lid on and buried it out in the woods. Now I only use CCI or sometimes Federal.