I have sent them an email, hope to hear back soon. If not I will call them.Call Federal and ask them if they recommend FGMM in the M1. Problem solved.
Surprised no one has addressed the powder charge of 54.2 grs. Am I the only one that thinks this is excessive for the M1? Considering that if it were a normal powder for the M1 its a gross overcharge and more likely its a much slower powder than the M1 is supposed to be comfortable with.