I haven't had any luck with milsurp ammo. The best stuff I have come across is the Sellier and Bellot ammo. Modern loaded, non corrosive and reloadable. I have two Enfields and both shoot this stuff very well. You can get it in 150gr soft points or 180gr FMJ. I had gotten a full case from HERE
But it seems that they are almost out.
I saw some a buymilsurp.com but I was going to ask everyone if they had and experience with them? Some of it is in bandoleers from WWII (corrosive??) other stuff is in 50 or 100 round packages I seem to remember that POF is in 32rd packages and that is what to avoid
I have bought Non-corrosive 303. It has been a long time so I can't really remember what is or is not. The Greek ammo seams to stick out in my mind as non-corrosive, but take that with a grain of salt.