I purchased a Remington Sendero 7mm mag and am planning on mounting a Vortex Viper 6.5-20x50mm PA scope on it. I probably won't be shooting past 500-600 yds and the range I go to is only 100 yds. Planning on getting a 0moa picatinny steel rail and steel rings but don't know which ones yet. Would it be better to get a 0moa rail or a 20moa rail, and if I get a 20moa, will I have a hard time zeroing it in at 100yds? I'm thinking that I should just get the 20moa so I have the versatility for longer range if I ever need it, as long as I can zero it in at my range. I know there is a big difference between aluminum and steel rails and rings, but if I am getting steel hardware, is there a big difference between companies? Any thoughts or recommendations?