It shouldn't feel gritty and resistant. If you've got pretty much any hub well adjusted it should spin without play and without grinding... However if you have cheap bearings, or poorly machined races, then you will get a gritty feeling and there will be more resistance than if you had Campagnolo .00001 Tolerance bearings... as you should have gathered from common sense. But it shouldn't grind, and it shouldn't be TOO gritty.