Try 180's or Sierra 175 Matchkings. Sometimes a barrel prefers a longer shank bullet?
IMO, a 125gr BT would not be an ideal bullet for deer sized game. Coyotes, YES by all means. I have also gotten my best groups with a 165gr Remington Core Lokt, 42grs Varget from my Win 88. Shot perfect clover leafs @ 100yds.
Sometimes a flat base bullet will shoot better than a boat tail.