you gone have to reduce the bud by about 50-65% in weight to have it fully dried to be stored for long time. but you should consider that curing the bud takes also some moister out still. so a good point to start curing is after the bud lost 35-40% of its weight in moister.
the aim is a rest humidity from around 12-20% under the fact that a fresh bud consist of 70-80 of water