Obviously, get the Swedish milsurp ammo if you can find it. I could never seem to locate more than a box or two. Then, I went to Prvi Partisan (Serbian) ammo. Was fairly cheap and widely available. Started reloading, using the once-fired Prvi brass, and never looked back. Some reloading manuals have separate sections - one for data on newly-manufactured arms, and one for milsurp arms. I do not differentiate between my 2 Swedish Mausers and my Norwegian Krag when loading, except for bullets. My Krag is over 100 yrs old and the lands and grooves have seen more wear than my Mausers. Therefore, I load it with heavier, therefore longer, bullets with a flat base to give more surface area for the lands to "grab." Seems to work for me.
"Wars are, of course, as a rule to be avoided; but they are far better than certain kinds of peace." - T.R.