Most calibers do this to some degree, the .50 is a excellent example at the extreme end, but your old 06, does it too. A good friend had a front grip bolt action handgun built by Riley Gilmore for the masters tournament, and when he showed it to me, I remarked on how close the scope was to the barrel, a dollar bill would barely slide between the objective lens and the barrel, 10 shots later, the objective lens shattered and the tube had a dent in it, right above the barrel. Expansion and contraction, barrel whip, barrel flex, it moved enough to contact the scope and it was a .243 !