BT100,
I know there are opinions on this issue, but I understood that it is best to assemble bolts clean w/o oil. I suspect this is due to cold weather causing hang-ups/slow fires. I recently purchased a qt. of G.I. surplus small arms oil that is not supposed to gum up. Hey Big Bill, this stuff better work.....you told me to get it! Hope that M48 is shootin' straight for you.
savageT