And believe it or not, primer changes can make a HUGE difference.
Also, I am not a real fan of 3031, in either 308 or 45/70. It seemed to reach over pressure signs with me and give a sharper felt recoil impulse many years ago. Your results may be different, but not from tthe pics....
My 308 powder choice leans towards Varget, 4064 (very close cousins in the powder world), 748, or 760.....all depends on what I am trying to do. TAC may be another to try, but it likes my .223/5.56 cases more.