Thanks for the information. The 4064 is what I have been using for my 308. I loaded a few 300 rounds also at around 58 gr and did not find it very consistant. I also loaded some 300 mag with 3031? or 3130? I have to look. I hand measure each charge but still have not gotten the results I would like. I shoot about 1 1/2 inch groups at 100 yards with my 300 but it widens out at 200 yds. Factory loads are much tighter. I would like to stay with 180 gr for my win mag. Eldrguello, which of those powders are the best for the 300? Are they all about the same?

Please explain loading density some more and where do I need to try to get. After measuring a charge do I want the case to be close to full or have more space in the case for gas buildup? Is that what you are talking about?