I think you are thinking of 0.005 or 0.01 gram….
Milligram is 0.001 Gram, That tight!! That’s The same as my AccuLab-VIC
0.001 grams = 0.0154323584 grains
Thats funny- I read his post as .015 rounded to .02, even though it says .15 rounded to .2. My eyes played tricks on me.