Hal,
  The only way I've noticed it between actions is due to the stock configuration. The original guns I have are fitted with fairly slim stocks and forends so they tend to torque and flip due to that slimness in the forend and the great amount of drop. That's why I hold those guns fairly tight and also to set and hold the rear bag so they will recoil in as straight a line as possible.

  Those guns I have with wide forends and straighter stocks tend to move straight back so don't wiggle around quite so much, but they still have to be set up to move in a straight line.
  Of course a lot also has to do with the caliber you're shooting.

  One thing that helps a great deal in this regard is to use a sled attached to your barrel.

PETE

Pete --- I just shut up shop for the night to find the P.M. you sent me .  Asleep at the bench --- nah, couldn;t correct all the mis cuts I'd make. My average day is about 10-12 hours with a few 15 hr. days.   I;m done for the night.