My postal scale weighs to 100 pounds and has about 5 different modes but grains is not one of them but it does do kilograms to 3 decimal places. Just weighed a partial box of 1000 69 gn Nosler .223 seconds. 2948 grams = 45,494 grains divided by 69 = 659 bullets or close enough
everything about reloading is nothing but numbers