I changed my mind. Probably 6.5 Creedmoor. I owned 20s 308, the flashider on my 308 is aac 3 prong. But this rifle has muzzle brake probably 6.5 creedmoor
I'm HK fan. But bought 20s instead. F*** HK, "They hate you". Most of their parts are ridiculous expensive. I went with the Scar 20s because their trigger are way better than HK. I think 20s look way better than HK.