Rocky, I'm pleased to note you used the word 'reasoning' instead of the word 'logic'
I tried some of Paco Kelly's loads in the 375 Winchester- well, I worked up towards them, anyway
I couldn't get anywhere near the loads he used without encountering pressure signs.
Barreledaction, I'd advise you to work up very carefully if you use Paco's data.
BTW, Speer makes a 180 .358 rifle bullet, so they should have some data on their website or in their manual.