I bought a Simmons red dot scope. I know not the best, but it was cheap and I just wanted one to toy around with. I'm playing with the idea of putting it on my Desert Eagle .50ae for giggles. So my question is...how many shots should I be able to get out of it w/o screwing it up? Again, I know it's not an Aimpoint, but I've never shot w/a red dot and I don't want to drop hundreds of dollars if I wind up not liking them.