I just picked up my new savage dual port lrpv 6 br and have two questions. What size bushing will I need for a Redding s type neck sizing die, I will be using Lapua brass, I don't mind buying several sizes if I need to. I know this is a new style, but if I use a Farrell style picatinny base will it look ok or interfere with the dual ports. I plan on using the Burris Signature Zee rings with it. By the way it's a 1-12 twist and I've got a Leupold V3 6.5x20 lr scope to mount on it. Thanks in advance and It's my first 6 br and yes I'm excited. It's a little cold here in Minnesota so I won't be hitting the range for a while yet.