In just my shooting life time,when I really started loading my own ammo in 68 and what we have for choices today is mind boggling to say the least, I started with surplus WW-II 20mm Cannon Power call 4831 and IMR-4350 now gee you could no nuts or broke trying all the stuff we have available today, panic buying not with standing! IMR-4151 just may become my new favorite powder for loading my 7 x 57! Time will tell.
