Guy dropped by earlier today - he is planning to start reloading and asked - "is it an art or a science"... made me think!
On balance it's a science IMO - based on chemistry and physics of course. However on reflection I can see some ''art'' aspect too, with regard to how we individually apply that science.
Classic example might be the ''tuning'' of a load to a specific firearm - rifles generally for most part, where this ''art'' I think comes in. Much of this is experience in the end, plus some good 'ol trial and error.
Appliance of science ....... fun ain't it