Not unless you are working at maximum loads for your rifle. Even coarse grain stick powders can be thrown close enough to produce excellent accuracy. A good working habit would be to check every fifth charge on the scales, or any charge that “felt” different when it was thrown. One exception to this might be if you are shooting long-range competitions. While very few competitors bother weighing their powder charges for ammunition to be used at the 200 and 300 yard lines, many do weigh charges for loads that will be used from 600 to 1000 yards (and beyond).