I acquired a 6.8 upper (18" bbl, 1:11 twist) last November because I wanted something heavier than a .223 and lighter than 300 Blk. I chose the 6.8 because of the range of bullet weights and versatility of uses. I reload for all my guns and looked forward to working through some loads for this rifle as well. I have run into some "challenges" with this cartridge and hope to get some help from those with experience at this task. One thing I noticed is that no one except Accurate Arms appears to show any load data for 130 and 140 grain bullets. Hodgdon and Lyman stop after 115 grain. At least the info I have doesn't. Another concern is the small and large primer brass available. Together with the use of magnum primers. I usually have better success when using Remington match primers and normally only use magnum primers when I see evidence of ignition problems. I would appreciate any guidance on the use of magnum primers and whether small or large primers are an advantage or not. I've not considered this cartridge in a bolt action but I am curious if accuracy is as illusive as it seems to be with an AR platform.