RE: M70 SUPER SHADOW 300 WSM (ZERO)
I don't know much about rifle maintenance so those suggestions I will leave up to the others. As only a shooter, I would maybe try Federal, Hornady or some other type of ammo in either 165, 168, or 180 grain cartridges. Also try something with a faster burning powder like a simple soft point because those XP3's kick HARD. Flinching may very well be an issue here so ease into it. What do you hunt mainly? Nice rifle by the way.