How much CH until I stop using Cal Hypo?

It's been a couple of weeks now since I've converted to the trouble free method with bleach instead of pucks/cal hypo but I still have a big bucket of cal hypo left in the shed. My CH is around 350. I figured I would just finish it up and then stick only to BBB. Is 350 too high to continue using cal hypo? What would you guys say is the upper threshold? Thanks!
 
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