A .022 gap struck me as ridiculously narrow. Working on motorcycles in the late 60s to early 70s gaps like that were the norm because coils sucked so badly they couldn't throw a spark across any gap at all. On the original single cam Honda 750s you had to clean the plugs and narrow the plug gaps every couple of thousand miles or the engine would get a case of the blind staggers at anything over half throttle.
As the decade progressed ignition systems got better and better until by the early 80s plug gaps in the .030 to .040 range were pretty common. Memory is some got into .050 territory. Now we're back into the .020s and .030s. I thought coil-in-cap systems and iridium plugs had relegated ignition problems to the history books. Appears not.
Folks are right about using caution gapping the iridiums. Mistakes get very expensive.