I reload for 2 of the 4 calibers you list. I have the 25-06 load workup down and am trying out Accubonds soon. I am still working up a load for the 270 but H4350 has promise with a balistic tip or Accubond bullet.
Rifle: Marlin XL7 in 25-06
Load: 51.5g - H4831 or 39.5g - Varget
Bullet: 117 gr Sierra Game King
Seat: .030 of lands (OAL=3.135)
Results: 5 shot group @ 100 yards = 0.662-0.0731 groups