I thought I would share this!
Lately I was having some FTF(Failure to Feed-Jam) and gas setting issues...
The Rilfe is new, bought it last May 2012, my 3RD XCR-L! BUT
the barrel was from my previous XCR-L so I have about 3500-4000rds shot with this one....
My 1st reaction was the wrong one..thought there was a problem with the rifle, turns out the problem was with me, the operator

Rifle is now cycling fine and on all settings...took it to range today and put around 200rd's down range, all my mags, standing, bench rest, quick follow-ups etc...ZERO issues!
Operator neglect, my fault! I finally did a full-strip down and cleaned the gas block and soaked the gas port selector in solvent...rifle is shooting great now on Gas Setting 1

So make sure after 500-800 rds clean that GAS PORT!