I think the 1 gram per 22# was cited on here way back near the beginning of the copper supplement era. So, I figured that was a modest dosage and adjusted accordingly. It's better to underdose at first than overdose in the beginning. (At least in my mind.) you can always give more copper, but can't take any away, once they eat it!
I think the 1 per 22 is probably a good starting point on trying to figure out the correct dosage for ones animals. Not every herd is the same though. Toth says she under doses the 1 per 22 and then waits 2 months, obviously that works for her goats. That wasn’t working with mine when I first started dipping my toes into copper bolusing. They were simply just getting worse. So now I over dose, according to the 1 per 22, and have to give every 3-4 months and I keep on top of it.
I really recommend keeping notes while trying to figure out how much and often to give to your goats. Don’t go rushing out there and give a huge amount, I would start with the 1 per 22 or if your not comfortable with that less but write it down. Keep track of if signs are getting better, when signs are presenting again and you will eventually get the hang of what works for YOURS