.280 Enfield...Ahead of its time

[stanc]

Perhaps, but many seem to believe that the cartridge change for the Garand was due to, at least in part, the large amount of .30 ammo already on hand.

I agree. I wasn't saying that inferior armor defeat capability was a factor in the decision to opt for .30 caliber. I was only noting that .276 penetration was lacking, and perhaps inadequate for the diverse target array in WWII.