Ok, well aside from extreme temps of ammo and barrel aside.
I re-set my action after double checking the mating surfaces and bedding. Made sure lug was fully seated. Then I go for the torque wrench and realize I had torqued at 50in/lbs instead of the usual 60. Torqued to 60 and hit the range. Had my usual drop at 2 minutes, and was putting some good groups down range. Everything is back to normal now. I can stop worrying.
Thanks for the help gentlemen, I owe you one.
J.