Today I competed USPSA Open Class with an 8 Shot PC 627 in Arab, AL. I happened to wear 5.11 Tac Lite Pro pants (same as 5.11 Tacticals, just lighter material)
With a 32 round stage I discovered in the 5.11's pant's magazine pocket I could perfectly stack 3 moon clips giving me 32 rounds total! Just reach in with a finger and drop 'em in the cylinder. Dropped an unneeded spare in my pocket giving 40 rounds total.. 5.11 makes numerous pants and shorts with mag carriers. Not a great solution for you lefties, as the mag pouch is on the left thigh, a knife pocket is on the right.
That solves a major issue for me also day to day when not competing. I have not wanted to carry the unsightly moon clip carrier aluminum contraptions that clip on the belt, or the carriers that just hold it on by two rounds. This is a great solution for me!