Adding the revolver tag to the Savery rifle gives the weapon damage reflected of it's stats on the information page, I was messing with tags trying to fix the same problem and noticed that the damage would reflect correctly with 7.62.
Edit: my Tags property is now this
<property name="Tags" value="weapon,ranged,revolver,holdBreathAiming,reloadPenalty,gun,noSilencer,barrelAttachments,sideAttachments,smallTopAttachments,mediumTopAttachments,largeTopAttachments,stock,bottomAttachments,attPerception,perkDeadEye,canHaveCosmetic"/>