One of our local matches is a military bolt action rifle match. I like to shoot my 1903A3 rifle in 30-06. Gotta admit after a 56 round match which includes two rapid fire stages, I have gone home feeling punished.
A friend loves those Mosin Nagant 91/30 rifles and fires them in the 200 yard matches while wearing a "T" shirt for a top. After firing 56 rounds from that brute, he has gone home with a blue shoulder. Of course, all vegetation forward of his firing line position is charred to the roots, as well.
Hey....there's your answer! Shoot about 50 rounds of 7.62x54R and when you return to the .308, it'll feel like a .22LR!