Google "zediker M14 handloading" for an article Glen Zediker did years ago on handloading for an M14.
The article is sussinct and easy to read. Probably the best bit of reloading info on the M14 anywhere; it should be in every hand loader's binder. The author brings to the article decades of US high power shooting not only under his belt, but many famous shooters and gunsmiths as well.
In it he summarizes the '14's issue with port pressures and covers the range of powders one should be using.
"Anything that is good for .308" is most definately not applicable...