Dear all, many thanks for all commets. I will sumarize somehow my decision. As I do not want to use AR platform of any kind and I want subsonic only as option for 10% of hunting related shooting, so this somehow kicks out anemic close range rounds like 300 BLK or 338 Spectre and also AR10 calibers like 338 creedmore or 375 raptor. At the end it will be 338 Federal or 338 RCM, based on what action I will use, or I will say to old greedy self that the 308 I already have altough not perfect, still more then good enough for what I need.