My 14” twist 35 Whelen shoots 310gr Woodleigh’s just fine out to 200yards. No signs of tipping that I could see. I have a PO Ackley built 35 Whelen improved that has a 16” twist. It shoots 250gr Nosler Partitions and 250gr Speer grand slams like a champ.
All that said, I don’t see a reason not to go with a 12” twist.
