I have not loaded 20s yet but 3" 12s. I set up a MEC sizemaster with an adjustable charge bar. I drop the powder, Allient Steel, and then check the weight on an electronic scale. It is not all that slow and I find I enjoy using my own loads. Steel will never be lead, but prices are getting out of sight. I want to know who is using the $4 a shot Hevishot. I have a 20 gauge Beretta 390 that I have used on ducks with factory ammo, I will try some loads for it, later in the year. Let me know how you make out. Shotgunner