Sierra might’ve discontinued them but the most awesome deer bullet for the 25-06 was the 120gr HPBT Gameking. Crazy accurate and never had a deer take a step.
I would give the Sierra 110gr TGK or Nosler 110 AB a try, if you can’t get the 120 HPBT’s.

For the Roberts, I’ve always liked 100gr Sierra GK or 100gr Nosler BT