Jim,
First thing I would check is my mounts and scope to make sure nothing is broken or working loose. I would also check my action screws. Then if all that checks out I am going to tell you something weird, but it is easy to try and won't cost you anything except a very little time.
Before you free float the barrel, instead actually add some pressure on that little pressure pad in the fore end of the stock. My rifle was very finicky about loads, shot some of them pretty well and some of them really poorly. I added some oil soaked business card shims on that little pressure point in the fore end of the rifle and it settled mine right down. A little pressure and something semi-soft to dampen vibrations and many loads now shoot sub-moa with the best hovering right at .5” consistently. It is easy to try and doesn’t cost you anything, if it doesn’t work you can always move on to other steps.