On top of all that the pitch on most rifles or lack of correct pitch can really hammer some people.30-06 used in competition is very rare these days. In specific M1 or Springfield matches; yes. But in any match where you are not required to use a special rifle or caliber, 30-06 just isn't seen anymore.
Not because it's not capable, it's probably just not a good trade-off between ballistics, recoil, amount of powder needed, etc.
BUT out side competitions hunting rifles are built to a average
If the pitch or toe in or out is off for your build you wont really notice inside 10 rounds or so.
This is why shotgun competition type shooters have 4-6 way adjustable butt plates and adjustable combs.
Shooting from a bench puts you in a odd position and all the recoil goes to your shoulder and your generally tense from leaning over.
Shooting prone you put more mass behind the shoulder.
Shooting sitting or standing you will flex a bit better , recoil is pushing you vs “hitting” when at the bench.