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Well done Bucksticks!My question now to you now is how do you calculate the starting point for this powder mate for any given cartridge?

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Hello 93x64mm,

Many times I use data from several books like; Cartridges of the World, and Donnelly's Handloaders Manual of Cartridge Conversions. If I can't find the exact cartridge I find something similar and start low. I mostly use I4198 and AR5744 for NFB and reduced loads. I stay very conservative - I have plenty of magnums for maximum loads.

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For some reason I have this niggly feeling that there is some formula thrown about that has been used for H4198/AR2207 for reduced loads?
I know Red Dot has the 50% rule for certain cartridges......but only in strong rifles!