Don't let internet experts get to you. Round here the average
caliber for whitetail deer at under 75 yards is the 7mm Rem mag! Power replacing placement is such a silly idea.
FWIW the .303 british was determined to be "too powerfull" & "Excessive", after WW@ & there were serious attempts to replace it with something having ballistics akin to the 30-30.
Allan Quartermain: “Automatic rifles. Who in God's name has automatic rifles”?
Elderly Hunter: “That's dashed unsporting. Probably Belgium.”