so I am funds low(new baby on the way and all) and waiting on a new scope but wanting to do a little shooting with my 300weatherby. I had this ole redfield lopro wide field laying around but dont know know a whole lot about it.. My understanding is I am supposed to take off the up/down turret and sight it in for 200 then replace and its supposed to work similar to a ballistic turret.. also do these tombstone rangfinders in the scope really work and I am not sure how this one works.. any info is appreciated