So if you call Swift directly, they will likely give you the pet load for that rifle and bullet weight. I did this for the 300 RUM and 300 WM. I spoke with the actual owner (don't remember his name off hand) and he gave me 2 powders for each. Result was 10 shot sub .5 group for the RUM on the first try! That load held that tight out to 550yds and then I simply got dope out to a 1000 and put it in the case with rounds ready to hunt!!!
I only loaded 5 rounds up for the WM since I was only able to find 2 boxes and those shot great as well.
People say they don't shoot well so maybe this was luck but Swift was incredibly helpful and I was given A-Frame data as well but haven't loaded for that yet.