Snuffy how'd you manage to keep them around for so long?? I have some great old boxes but had to use the primers up as fast as I got them way back then. These days I have a bit more $$ and can buy a bunch ahead so I never run out. Helped a LOT in the past 2-3 years for sure.
Post the lot numbers and I'll try to break the date out. The Winchester primer white boxes changed to purple boxes at the same time Winchester stopped nickel plating their primers. Some say that was 1999.