FWIW, an adjustable gas system vent plug available from several sources can help compensate for differences in projectile weight and/or powder burning rate to some degree. They are often used on competition weapons to optimize function with 170-odd gr. Match loads.
While it won't extend one's options to include every commercial variety of .30/06 or .308 ammo out there, it will expand them to include a good deal more than M-2 ball or NATO-spec surplus.
Personally, I opted for 7.62x51 when I purchased my present Garand, an Arlington Arsenal rework, several years ago. As I no longer compete in Service Rifle matches formally, my primary reason for doing so was the greater availability and reduced cost of surplus/commercial generic ammo in that caliber.
With the adjustable plug I was able to utilize the 165 gr. JSPs I purchased a sizable lot of at an auction for less than $0.02/ea for virtually all of my plinking/practice loads in .308, 7.62x51, .30/06 and 7.5x55 Swiss, reducing my handloading costs by no small amount. Having the means to "tailor the rifle to the load" to some degree increases one's load development options for a semi-auto enormously.