A very good all-around scope - Vortex Crossfire II Hog Hunter 3-12x56mm 30mm Tube Second Focal Plane Rifle Scope

This scope has no noticeable parallax at 50 yrds. I've been using this scope to shoot .5 moa at 100 yards and I haven't had any issues with it at all. I have no idea of the battery life because I haven't used the battery. Everything about this scope seems to work well. The center circle is small and light enough to easily focus on a small target area at 200 plus yards. Very nice recticle. When mounting you may need to go to a medium ring on a rail mount or a tall ring on a double mount. (like the Rem700).