It will be much better than 316L but 75% of C10L14 is too optimistic.
Many stainless steels work harden when they are machined so you normally need to go slowish on the rpm, for 316L I would be as low as 100SFM even with carbide, and you need to keep a good chipload so the cutting edge is underneath the hard skin created by the preceding cut.
I have little experience with 400 series stainless so I don't know if they work harden the same, but if you start out slow with a good cut you may be able to work up from there.
An open mind is a virtue...so long as all the common sense has not leaked out.