I am having trouble deciding wich base to put on my Remington .220 swift. I was wondering about a picatinny rail, will the 20 moa base serve well for shooting at 200- 600 yards? Or should I get a standard picattiny rail? I will be mounting a Vortex Viper 6.5-20x I think it has a 44mm bell. What do you guys think? Anybody have experience with Millet or leatherwood bases? They are cheaper. Or should I spend the extra$$$$ on Leoupld or NF? I have no experience with the Picatinny rails but I hate having to twist those beaver tail front rings in they are a PIA