Well I've got my two Dillon 550's for pistol. One set up for large primers and one for small. I've been loading rifle calibers on my Lyman Orange Crusher using Lee dippers droping onto a Dillon beam scale for a lot of years. Was looking for something to speed up that powder measuring piece.--- Knob Creek
Here’s what I think about throwing and measuring powder.
1. Beam scales are more accurate then electronic* scales.
2. Electronic* scales are faster to use then beam scales.
3. Electronic* scales can be used to load all but the most accurate ammo.
I think you are looking to speed up loading your rifle calibers, while still measuring each load, as compared to using the Lee dippers and a beam scale (and while not trying to load beach rest quality ammo).
You can do that by switching to a stand alone powder drop similar to the one in your Dillon 550’s, like the Lyman 55 or the Reading 3BR, an electronic scale and a powder dribbler. If you use a proper technique you can load accurate rifle ammo.
The technique goes something like this. You throw powder from the powder drop into the electronics scale’s pan (the pan is held under and touching powder drop). The pan is placed on the calibrated scale and powder is dribbled into the pan until the proper amount is reached.
Keys to speed are adjusting the powder drop, to drop 0.1 to 0.2 grains less then desired weight and dribbling powder from a battery powdered dribbler. The closer to the desired throw weight with out going over and the faster the dribbler, the faster you will load.
Keys to accuracy are using the electronic scale in a draft free room. Place a ferrite on the scale’s power cord to reduce power line noise. Repeat each reloading step as exactly as possible. Always approach the desired powder weight from below so that you can dribble the last couple 10ths of a grain of powder thus removing some electronic scale inaccuracies.
*In very expensive units the difference would be so small that you wouldn’t notice it, but you will not be using a very expensive unit (most likely).
Respectfully,
jkelly