the US Navy converted a number of M1s to 308 by putting in chamber adapters but they had a nasty habit of extracting with the spent casings so they started getting barrels already chambered in 308, CMP has these barreled actions for sale right now and they also offer a special grade garand with new stocks and converted with new criterion barrels in 308 and have magazine blocks to prevent accidental loading of 30-06 into them.
all guns lost in a tragic smelting accident.
I never said half the crap people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin
Bean counters told me I couldn't fire a man for being in a wheelchair, did it anyway. Ramps are expensive.-Cave Johnson.