Retumbo all the way. I get 3,400 fps with a 180 AB in my long throated 26" 300RUM and it keeps groups in the 3/8 moaJust want some thoughts on which one would be the better powder. I have 8133 and have been using it in my 300 rum but have always heard Retumbo is the way to go. I also shoot some heavies in 7mm rem mag also but haven't done any load work up with 8133. I've never shot Retumbo deciding whether to buy an 8# can when it's available or just stick to the 8133 would like your thoughts.