Thanks for the replies. I have about 1500 cases and keep good track for there use. I have cycled through my older cases three times. At what point do I need to start considering newer brass?
Before using PP I tried W231, Bullseye and HS-6. My best results were with Bullseye using 5.4gr, CCI primer 1.125 OAL.
Good idea on using factory ammo. Since I reload everything I shoot, factory was not even a consideration for me.