I shoot a 7mm stw that shoots a 140tsx at 3400+fps. I have a SWarovski scope with a 4a reticle on it but I am looking for something to help me with long range shooting out to 600 yards. I like the looks of the Leupold B+C reticle but wonder if this system is hard to use? My main concern is that here in Alberta we shoot at running animals a lot on the open prairies and wonder if with the B+C reticle it may be hard to use this reticle with running animals. What do you guys find when you use this system on a running animal at 300 yards and less?