I use this powder for , 6.5 Creedmoor , 270 WSM ,7mm mag, 300 WSM, 300 win mag and my 338 Lapua mag . The Creedmoor was a stroke of luck . I was having trouble with my Remington Magpul and was about to give up . Using IMR4831 powder with 140g ELD-M gave me the grouping i was looking for .