Studdog,
Confusing indeed.
Some of the members may have noticed our friend Mr. Whacky (Whckmstr1, whckmstr, etc.) spewing forth all sorts of garbage over the last few days, somewhat reminding me of a burning Kuwaiti oil well after the gulf war. Some of it was actually useful, much was not, and plenty of it was foul and vulgar. If you did not see examples of the last category, consider yourself fortunate. The moderators have been working to clean up the mess.
Our friend has been asked to stay off the forum, and we hope to avoid this sort of behavior in the future. In the meantime, should anyone see a post that contains information that may be confusing or incorrect, please don't hesitate to speak up. Even the best of us make mistakes and typos now and then.
Suggested load data should always be compared to information published by the bullet and powder companies, and as you note, worked up carefully.
FYI any .450 Marlin shooters out there should be sure to check the Hodgdon web site (www.hodgdon.com) as they have load data for this relatively new round available there.