Well, just to throw a hat into the ring, here's one more vote for a Leupold VX-III 1.75-6x (in real magnification terms, I believe the specs are 1.5-5.5x). Myself, I think the 20mm objectives just aren't as bright, say what you will regarding the measurement of the exit pupil. I've looked through a VX-III 1.5-5x and a 1.75-6x side-by-side late in the day, and the latter scope was noticeably brighter at the same power setting. Not a ton brighter, but enough to notice.
At the higher end of the magnification setting, that should be enough to place your shot well on a target 300 yards away. As Dogleg already pointed out, beyond 300 it's probably time to call it a day or figure out how to get closer.
While I'm going to agree with He-Who-Blows-Up-M14s
that a VXIII 3.5-10x is about the perfect all-around hunting scope, I'm just not sold on it for a .375. For me, at least, on a rifle has enough juice to push you around some, it's a heck of a lot easier to recover for a follow-on shot when the magnification level is lower. That said, I can't think of anything I'll ever be doing with a .375 where a reasonably bright 6x view just isn't enough.
At the higher end of the magnification setting, that should be enough to place your shot well on a target 300 yards away. As Dogleg already pointed out, beyond 300 it's probably time to call it a day or figure out how to get closer.
While I'm going to agree with He-Who-Blows-Up-M14s




















































