I'm an old guy and Uplula is the answer. Shield mags are a piece of cake with it. The only mag I have that's still a bit of a struggle to get the last round in with it is my .45 Compact, but it's a new gun and will break in with time.

I usually go through a few hundred rounds on a range day and even though I could probably load all my mags without the Uplula I certainly wouldn't want to. It's nice that you only need one Uplula to load both 9mm and .45 ACP. It's $30 well spent.