No experience w/FIST #22, but have had poor luck with #20
Since I'm a lil on the "buffet line" size I use a MTAC or Crossbreed Supertuck when there's need for tails in. The CB even has spacers on the clip for increased clearance for shirts.
My .02
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Why is it that you always find things at the last place you looked?
Because when you find something-you stop looking-Mooch