Been using 4064 for years and love it. I use the same data for 7.62x51 and 7.5 MAS with identical results.
VFW Life Member. DAV Life Member. Member, Marine Corps League.
"The staff officers want to run a staff war when really this is a noncom's war . . . The colonels must march with their men, not circle overhead in helicopters while the poor wretches sweat it out in the hills. The rebel leader we are up against marches with his men, draws the same pay as they do eats the same rations."
LtCol Marcel Bigeard