I picked up a Savage 10 PC, not to long ago. To start getting into shooting long distance. That being said it had a Weaver base on it and I through a Bushnell 6-24x40 and burris xtr rings on it. Well after shooting for a while I want a nicer scope on there so Im going with a Vortex PST FFP 4-16x50 scope and switching to Seekins rings, my xtr rings are letting the scope slide. So I have two questions, how is the Weaver base, good or should upgrade? Last with the Seekins rings, am I really anything with their 6/4 screw cap over a 4 screw cap? Thanks.