Reloading used to be a HUGE savings. Over time, it has become less and less affordable, especially for smaller calibers. These days, the real savings are seen mostly with the large calibers for both rifle and handgun.
As for storing powder, my only caution would be to store it in a cool place that is not going to fluctuate in temperature often.
As for storing powder, my only caution would be to store it in a cool place that is not going to fluctuate in temperature often.