Do you have any reloading manuals? They are an excellent resource guide to the reloading process.
Concerning load data, I utilize Hodgdon's website since they cover loads for Hodgdon, IMR, and Winchester powders, they list starting and max loads, show pressure and the specifics of the load (primer type and barrel length). Lots of bullets are listed.
Some powders prefer magnum primers, some prefer a strong crimp.
You will save a lot of money loading for the 41 mag.
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