Hodgdon have data on their website. Not specifically for the 180gr tgk/sbt but for other 180gr jacketed bullets. I'd consider them the golden source of info since it's their powder.
Never mind what the published max charges are either. If you see zero signs of pressure during your workup then you can always work up a bit over "max" if you want, or if you see pressure signs earlier then you stop short of it.
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