I've found rating at 400, it underexposes, or else the negs come out very very thin (no density compared to ilford, so the shots are all pale on the neg, even in overexposed parts).. I'm using generic developer, so if I were you, run a 10-shot test roll with your dev and see if it's just me (yes yes, I can read a lightmeter 😀 ) and my choice.
I'm about to scan a few test shots from my leica, so they'll be up tonight, but its the usual garden variety.