Was just reading an old book I have on rifles,"The Book Of Rifles" by Smith & Smith. In it it states the M39 were meant to be used with 200 grain,boattail, D-166 bullet. Has anybody tried any 200 grain bullets? All I seem to have are of the 147 grain variety in surplus ammo. I do have some 200 grain Wolf commerical ammo. I am thinking of trying it in my M39's. Any thoughts anybody?