I have a Leupold VX-R 3x9-40 mm with the Ballistic FireDot reticle on my 450 BM and a Nikon Prostaff 3x9-40mm with a BDC reticle on my Savage .30-06. Neither of these is the model you are interested in, but here is my experience. I think the 450BM is good to about 300 yards, before the bullet drop goes through the cellar. For that reason, a reticle that will allow you to range at 100, 200, and 300 yards pretty much covers the ground, so you don't need a lot of gradations in it. My Nikon is set up for the .30-06 and it has gradations out to 500 yards, which are spot on out to 400 yards, which is as far as I have shot it. That would be overkill for the BM.
Here is a link to the Leupold reticle -
http://www.leupold.com/reticles/ballistic-firedot/. I sighted mine in at 200 yards. The top of the circle is the "hold-under" point for 50 and 100 yards, and the bottom horizontal mark is hold over for 300 yards. I couldn't find an image for the Nikon you are interested in, so I don't know what the reticle looks like.
I like the added magnification of the 3x9, but that is a personal preference. If your shooting shorter ranges, the 7x is enough and the 2x gives you a wider FOV for pigs, for example.
Hope this helps.