I am beginning to gather parts for a new rifle and have questions about 20MOA scope bases. I am building a 7RUM and plan to probably use Leupold glass. If I use one of the long range elevated bases, will I still be able to get a 250-300 yard POI zero when desired? I hope this question makes sense. I am not exactly sure how to ask it. I just want to make sure I can still make a shorter shot without holding "under".