Help How to measure SN ?

[arrow12]

So my sn just arrived but i don't have scale machine.My package is of 500g how should i take 25g please elaborate.
thanks

 

[dedalus1238900]

Online stores sell cheep mg scales for $20. A kitchen supply store maybe. But if you can't find some thing in tiime make a little scale find something you know the weight of, say a quarter and use something simple to have them equal. SN is forgiving to a degree 20 vs 22 vs 25 is pretty safe compared to 2mg being a good time and 4 mg is deadly.