I find nearly all the beers at a certain brewery to have a hard dry bitter finish and a lingering salty flavour. Talking to them and doing some beer matt calculations show approx 20ppm sodium which can easily range from 0-150ppm without tasting salty and so shouldn't be the problem. Exploring RA reductions of approx 50ppm as CaCO3 to mellow the harsh/coarseness and trying to tone down the sulfates as previous recipes were designed with 'accentuates hop bitterness, crispness and dryness' taken to mean 'our beers will be REALLY hoppy' when it isn't really the same thing.