Once you have mastered the scales and powder measure -and there are plenty of videos on Youtube to help you do this- I'd seriously consider putting some money into, or saving up for, a
Targetmaster trickler.
The procedure is as follows:
1. Zero the scale (don't forget to put the scale pan on first!).
2. With no powder in the trickler, start it running and dial down the sensor slowly until the trickler stops. The trickler is now zeroed.
3. Move the sliders on the scale to set the desired charge weight
3. Half fill the powder measure and set it up to throw just under the charge weight you want. It won't throw identical charges each time so aim to set it to throw charges that lift the indicator at the l/H end of the beam about half-way to the indicator on the scale body. This will ensure that no charge from the measure is heavier than your desire charge weight.
4. Fill the hopper on the Targetmaster with the powder you are using.
With a little practice you can do all this in about 5 minutes.
Now that you're all set up, all you have to do is throw a charge with the measure -I use a shot glass to throw it into (anti-static and high-sided so no kernels stick or bounce out); tip it into the scale pan and place this on the scale. Then press the button on the trickler and you should have just enough time while it does its stuff to throw another charge into the shot glass.
Now you have a super-precise charge on the scale pan and a slightly-underweight charge in the shot glass. So, simply funnel the charge in the scale pan into one of the prepped and primed cartridge cases in your loading block; tip the charge from the shot glass into the scale pan; press the trickler button; and throw another charge from the measure into the glass. Repeat as necessary!
You can adjust the speed the trickler takes by adjusting its tilt via the threaded foot at the front, and/or by setting the powder measure to throw charges that need more topping up. Get it right and you have time to move the funnel to the next case, and to seat a bullet in the case you've just dropped a charge into, before the trickler stops and the next charge is ready to go into the next case. The more practice you get the faster you get, as "dead" time is eliminated.
You can also speed up the set-up process by starting the trickler once you've filled it and manually tilting it until the first kernels of powder fall onto the scale pan (these can then be tipped back into the trickler hopper or the powder measure). This action will "prime" the trickler tube without requiring you to rely on its rotation to work kernels up its bore, which can take a minute or so.
I'm sorry if this seems well beyond your current horizons, but IMO it is the fastest, most consistent and most precise way to assemble rifle ammunition, the best way to get the most out of a basic measure and scale, and is an approach you should look forward to deriving much satisfaction from in future!