ditto on this below //
I always do for both pistol and rifle. Just one time, only takes a second and I don't have to second guess about whether it was done at the factory or not.
Pistol never gets done again, rifle will get done after any trim.
Did 1000 Starline 45 colt over the holidays. Went ahead and sized and primed all as a batch for later loading.
LEO, NRA member, Native Texan. Shooting and hunting for over 45 years!