I use three powder measures; an RCBS, a Hornady and a Dillon.....
Some measures perform better with certain powders....
If I remember correctly, neither the RCBS and Hornady measures came from the factory with the powder tent and the addition of these optional pieces in each powder holding bin made a significant improvement in consistent powder drops.
The Dillon came with a tent from the factory and, generally, it is the most consistent measure of all three.
The other IMPORTANT issue is proper cleaning. Hornady and RCBS powder measures are shipped from the factory with a heavy gunk on the parts to protect them while they are in inventory. You must take the measure completely apart and clean all the factory goo off. ...otherwise, the measures will not throw consistent charges.