that my be s4s4u i will try both . did u have powder res in cases or cylinder?
NO res, it burns clean as a whistle. I was equating the original question to any performance gain, which would be little to none. I have only used WLP's and was unaware of issues with "poofing" with some primers. If that is the case I would use a mag primer whenever it is available, but I have had no probs with WLP's.
