Wartime steel is a new one. They did slightly reduce the Moly
and that's all.
The A3s require more "dabs" of straight Nickle to clarify and settle the puddle,in a TIG process then the interwar years actions, IMO. The inter-war year materials wet out and settle cleaner boundary / margin zones than the later stuff, and that would include the M1s, too.
Double lugging a WW2 M1 can be like lighting a FIREWORK, and the only thing I can figure is carbides or oxides included.
I've got notes here that indicate I first made that call close to 20 years ago. Prior to that it was all O2 / Accetylene (for me) and I never really had that degree of control, or ability to look into a puddle that TIG gives.
Less Moly,...who'd a thunk that would make such a difference ?
GTC