I've loaded for over 45 years and with only one exception have I ever varied from recommended loads. ( I exceeded the Hornady recommended power load for FTX Bullets but was still within the recommendations for other bullets of the same weight - after carefully checking my bullet to lands gap.)(Not something that I would recommend for someone else)
All of my load data manuals calls for the 30-30 to use a .308 bullet. That is what I would use. Better to error on the side of safety.
JMHO for what it's worth. The 30-30 is a hunting rifle and not known for it's extreme accuracy. 2" MOA at 100 yards is exceptional for a hunting rifle.
"It is what it is", enjoy it.
All of my load data manuals calls for the 30-30 to use a .308 bullet. That is what I would use. Better to error on the side of safety.
JMHO for what it's worth. The 30-30 is a hunting rifle and not known for it's extreme accuracy. 2" MOA at 100 yards is exceptional for a hunting rifle.
"It is what it is", enjoy it.