Recharging magazines in between stages in a match can be tiresome and distracting. Without the Uplula my fingers would be bruised and sore. I've used mine for 9mm, .4 and .45 ACP and wouldn't be without it. Loading 10 or 12 SIG mags was a painful chore I didn't want to tolerate. Unloading AR .223 mags is a pain but not with the dedicated loader. Yay Magula!