I have a 28 Nosler barrel for my AI AXMC. Love this round. I just started experimenting with some Retumbo. For the 168grn round it seems to like 81.3gns, 168 SMK, Nosler brass, Federal match 215 primers. 3165 FPS, .33” groups. There is some room for fine tuning,Temp didnt affect the round any, I...