I searched for this, but didn't see many posts. Is anyone shooting a 6.8 SPC? What barrel are you using? Did it come pre-threaded? Any thoughts on a 20" heavy barrel? I'm thinking about a different barrel for my Model 16 for a 100 yard deer cartridge. I have a 243, 30-06, 7mm WSM, etc, but I want something different. Before you ask why, because I want one. ;D