The Air Force never wanted the CAS mission, but they don't want the Army to have the capability. Witness how they got the armed Mohawk outlawed. Army aviation's greatest enemy is the U.S. Airforce.
I have à Herter's die that only sizes the neck. So far the rounds work in two Rugers and a Rossi. It is not a carbide die so I haven't used it in years.
HELL NO!
30/30 has much more taper and shoulder is further back.
You can resize the neck if you are really careful to not resist the body and not set the shoulder back but I do not recommend it. Graff & Son sometimes has Redding dies.
Pictures were a really big deal in those days. They would be made up to look like the picture of health, thus the rouge for rosy cheeks.
The gun was probably a prop provided by the photographer.