Lee dippers, key word, Lee, Lee dippers came with instructions.
Required reading is not required when reloading, should be, but reloadrs find it saves time to go from beginning to 'expert' if they take the short cut. R. Lee designed, developed and manufactured Lee dippers, dippers came before Lee, there was no need to rediscover America. Adjustable dippers have been available since the late 1800's, the problem was 'net work', most reloaders were on their own, Lee put the information with the dipper.
If the correct dipper is used with the correct powder there is no way the reloader can get into trouble if the powder is racked off lever with the top of the dipper (starting load), a level dipper full is the starting load, a dipper, unraked with the maximum amount of powder is maximum as in one more flake of powder will cause a landslide is maximum.
For those that went from start to expert without required reading I suggest you take lee's advise and use powder scales to test the capacity of the dippers by levering the dipper with powder then weigh, after wards, use the same dipper with the same powder to get a heaping dipper full and weigh, the difference should be the difference between starting and maximum loads, and if not, why did Lee build all the different dippers with different height and diameters?
The dipper is the old way, the scale to dipping is to verify, I am a big fan of verifying, I am also a big fan of required reading, R. Lee was paid to develop loads, he listed loads in grains because they required him to furnish loads in grains, he developed the loads at the range with dippers, then went back to the shop and used scales to weigh the powder in grains, and, he was quite amused at their ignorance?
F. Guffey