So I know this is old but I have a 6.5x284 I'm working up a load for. 26" Krieger 1:8 I think it a #5 heavy sporter. Any ways I'm 65 or so rounds down the tube and the only set I got to shoot was about 10tho jam at around 50 grains 4831sc. This is a hunting rifle and I can't use that in the field. Back to my question, isn't 4831 and retumbo a little to slow of a powder for 127grain bullets? I have 4350, 4831, retumbo, R26. And if I can't get Berger's or 143 eldxs to shoot better than an inch soon I'm guna try a different approach all together