I don't know what crimped primers do, other than advertizing. All of the LC match ammo for the Garands/M1a's was uncrimped.
For the 30-06, keep your 150 grain bullets below 2700 fps. TW54 actually chronographs around 2650 in my rifles. The military round was actually mild in comparision to the minie magnum crazy that currently sells today's ammunition.
At the 2001 John Garand Matches at Camp Perry, the CMP handed out Federal 150 grain ammo made to commerical specs. The stuff chronographed around 2800-2900 fps. It was hot.
There were malfunctions all over the place. My Retired Marine shooter, his clip jumped out during rapid fire and jammed his rifle. His rifle was almost new, was not the rifle's fault. That day I heard of operating rod dismounts.
Look you can shoot hot ammo in a Garand. Expect function issues, maybe a bent operating rod, or this little function issue:
Poster from Jouster said HXP 69, Greek surplus did this to his receiver. The Greek I have shot is hotter than US, but milder than commerical.
These receivers are old, and do you really want to do this to your rifle?