Its good to finally get a long range forum on the site. I am also a member of another sited dedicated to long range hunting and shooting. I learned quite a bit over there. I started getting into shooting long range last year but things have been stalled lately with all the muzzleloader shooting I've been doing and also that I haven't found a place where I can shoot very far.
I have a Bergara B-14 HMR in 6.5 Creedmoor that is a very accurate rifle. After about 6 months of load development I finally found a load that it really likes (although it shot everything good). This load shoot consistent 1/4-1/2 MOA.
I'd be happy to share what I've learned with fellow members.