I recently went to a gun show and ,for a price I couldn't pass up, picked up a Tasco Mag 50 5*20 with trajectory for 1000 yds for elk and lope, and an moveable crosshair for 600yds. I realise this is no fancy target scope but I can't find any information on it on the net. If anyone knows anything about them I would appreciate a reply. I am just interested in maybe hitting a deer or elk at 400-500 yards. Do they hold zero and are they reliable?