I would be glad to shoot in Madison with you. For the record COAL is just for making it fit into the mag.
I shot my new 6.5x47 this weekend. It needs work. Had 3 1/4" group at 400
Start at the lands and work back .005 or .010 until you find the bullet node. Then start upping the powder charge until you find that node. Watch your cases for high pressure signs.
I will be doing this with my new 6.5x47L. After you get all that done then we can talk neck tension. You have just...