I didn’t find that so. The most powerful kick from a .30-06 that I ever experienced was with a Garand M1 NM Match rifle owned by a local gun club. It had been glass-bedded for accuracy. And, boy, it was accurate! I had not fired an M1 for 30 years, but was permitted to use this in a DCM shoot for qualification to buy my M1. Actually I came in third out of a group of 20 fellow competitors, some of them regular shooters of that club. At the time I used the M1903, I was carrying the M1 as an infantryman. The M1903 was a sweet shooter.
Have your M1 converted to 7.62 NATO/.308 Win -—— easier shooting, cheaper ammo, and same results as the .30-06 at the far end!