I have a Sako 270 WSM with a 23 inch barrel and want to shoot the Hornady145 ELDX. I tried them to see how they shoot and got a surprise when my first load put 3 shots under half an inch. I then tried a half grain more of the Retumbo and got a half inch group. These loads are the best this rifle has shot for me. A half grain more and the group went over an inch. My thought then was load up the middle load hoping it would reach over 3100fps. Chrono results showed only 3020 a little disappointing. The load is 68.5 grains of Retumbo behind the 145ELDX. Is there another powder that will give better velocity or should I be happy with what I have got. I know all rifles are different but some powders do perfom better in certain cartridges. What are others using I guess is what I am asking.