I have been loading for several 270WSM rifles the past few years, but ran into something that baffles me a bit. I am loading for the first time 140 accubonds w/Retumbo powder, Win cases and 215M primers. I used 71grs as a max and backed off 8% or 65.2grs as a starting point. By the time I reached 67.8grs my primers were cratering slightly. I tried a load at 69 and the bolt became sticky. This rifle normally shoots at near max loads without an issue. Does this seem unusual to anyone? I don't have a chronograph so I have no idea about velocity. Is that max already? The bullets are not jammed into the rifling.