The stocks on those rifles are pretty flimsy. So you need to be careful where you place your front rest. Even though the barrel is "floated", if you place the rifle on the rest in the wrong position, or hold the rifle incorrectly it will still put pressure on the barrel. That will yield sporadic results.
The closer you place your front bag to the lug area, the more consistent your rifle will shoot. Try moving your front bag back to the lug, and always put the front bag in the exact same spot. That will help.
"Free floating" a barrel has become a buzz word for the mfrs. Years ago the mfrs. took the time to "bed" the action and barrel lug properly. And some even bedded the barrel, or placed proper pressure points on "light whippy" barrels(which is the best way to properly bed a light barrel(IMO)). Now they just pour some plastic in a mold, tighen up the screws, and call it a "rifle stock". I guess that is the price you pay for progress. Tom.