I'll add my second to what Zonie says about pure lead. The concept of loading a bore size bare bullet relied on the propellant's detonation to "bump" the bullet into the rifling.
Tin and/or antimony is often used to harden the load for some applications, but you will find these alloys not as accurate as pure (99%) lead as they do not expand as well into the rifling. You may want to purchase lead with known purity rather than rely on scrap, assuming you are casting your own bullets.
For match shooting, perhaps of 20 or more rounds, I've found 70grs 2F works well enough out to 600 yards, and avoids the shoulder-pounding heavier loads produce. Yes, I give up a bit of velocity, and yes, the bullet will wind-drift a bit more. But at the end of the day, I can still lift my right arm, my cheek is not sore, and my shoulder is not numb.