Weight difference

Anybody know the difference in weight between a 9" drum spindle and a 10" drum spindle? Thinking of switching my front brake setup, but it requires a 10" drum spindle.
I can't remember if I "scaled" it, but when I went from a 7.25 rear to the 8.75 rear (9" to 10.25), the drum weight was definitely noticeable by feel/hand. Seemed like about a pound or more each.