Never ever had that problem with any 30/30
rifle or ammo.
Shot Remington, Winchester, Federal,
Hornady factory loads.
Marlin, Remington, Savage, Contender,
My own hand loads forever plus 2 days
with every suitable powder and primer
from just barely a pop, to really shouldn't
be loading that with no problems.
Back in the 70's, I did have some factory
Federal loads that I experienced neck
splits with, but that's it.
I'll also add that I've loaded some of my
30/30 cases way more times than I've
kept track of, and they still work great,
aren't stretched, primer pockets still