I use the Leupold VX-III 6.5-20x50mm LR for silhouette, with the target dot reticle. It sits on top of my hunter gun, and I love it. It does focus down to the 40 meters, with no problem.
My only problem with it, is that it doesn't focus down to 50ft for the indoor league. If I had the dough, I would buy a couple more of them.
C Hunter