MagPro powder was designed for the New Short Magnums but works well in the 270 Win , 243 and so on. I use MagPro in my Model 70 Featherweight 270 WSM with the 140 Nosler Accubond and the load groups 1/2 inch for three shots at 100 yards and this is the first and only load i have tried in this rifle, so i just stopped there. I am going to try this powder in my 280 Ack and 243 Win. I was wondering if anyone had already tried it in their 243's. /ubbthreads/images/graemlins/grin.gif