I would gently suggest the #3.. Stiffer is better with that round, IMHO..
I'm gonna get the parts all ordered up, but I'm thinking I might have you do the fitting.
I've got the time, AND the reamer..
David, on the Scirrocos, start those loads out near minimum and watch for the pressure to jump.. A very experienced rifleman and reloader near me wasn't able to get decent speed w/o pressure signs.. Max he could safely load ended up about 150 fps under book.. Just FYI..
