Shotgun: For the heavy stuff, use ONLY factory loads, period.
For the rifle/pistol cartridges: Load the Powder charge in lots of 50—visually check the powder level in EVERY case in the loading block of 50 with a flashlight.
This only takes a few seconds.
Then weigh your charge in the scale for the NEXT 50.
At least I haven’t blown anything up——YET!
That is what I do. Any oddball charge stands out.