N120 is usually the go to powder for small 17s, works well for me in 17AH.
I have though found despite the small size of the kernals you can get an occasional powder hang up in a funnel so you do need to keep your wits about you.
My own procedure is one round filled, then bullet seated, then weighed and boxed rather than fill perhaps 6 or 10 cases at a time then seat as I do with bigger calibers.
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