i am gonna try to be there for the December shoot...still have to join first though...
No, you do not need to be a member first.
A 308 running 175 SMKs at 2600 fps needs about 40 MOA of drop to reach 1000 yards. Spin your dials and see if you have that available. If not PM me and we can talk about how to get it set up.
I would suggest you attend a Rec fire event with your present scope.
Perhaps if things work out in December and I go to the F-class match then you can swap with me on my rifle. It is set up and accurate and drops are known. I have plenty of bullets ( I think).