That's 72.5%, I wouldn't expect that to be impossibly wet. But just drop hydration until you get a manageable dough, you'll probably find that 400g of water (65%) is a lot easier to handle. Probably the most valuable thing of my foray into 80%+ hydration loafs is that medium hydration (~70%) doughs are much easier to work with now.
That's 72.5%, I wouldn't expect that to be impossibly wet. But just drop hydration until you get a manageable dough, you'll probably find that 400g of water (65%) is a lot easier to handle. Probably the most valuable thing of my foray into 80%+ hydration loafs is that medium hydration (~70%) doughs are much easier to work with now.