LD
The hydration at 500g flour to 325g/ml water is 65%; the same as I use in my 'every day' bread. This shouldn't give a too wet dough if kneaded well/risen/knocked back well and proved as can be seen in the photos here.
The mix that Dave (saucisson) used with 350ml/gm water is 70% - wetter? Yes, but with careful handling, and a good dusting of flour when shaping, won't just spread but will rise nicely - as in the rolls here which have to be shaped to virtually their final width before proving as they hardly expand at all. Johnfb has also made these, perhaps he will let us know whether this was also his experience?
The 500/300 ratio of flour/liquid equates to 60% and I would expect this to be quite a firm dough, that without something like an improver, would be quite a dense/heavy texture. 60% is even less than the 'traditional' 1lb flour to 1/2 pint liquid (approx 63%)!
The best bit of breadmaking advice I was ever given is to knead the dough for twice as long as you think you should!
Hope this helps
Phil