Mike, you got away from what I said in my posting.
Here it is.
How do you account for the fact that when you look up loads on the Hodgdon site on the computer, there is no mention of whether to use a standard, or a magnum primer?
Did I not plainly state, "--loadings on the computer?"
The modern loading manuals are all written, to the very best they can, to protect themselves from law suits.
Look at any of the loading charts from say, the 1960s. See if you can see any mention of primer used, or what brand or type of bullet used, just the weight of the bullet, or any mention of what brand of case!
And we all ended up with the usual number of digits intact, proper eyesight, etc.