You didn't specify which M327 you have but on my M327TRR8 once you remove the yoke & cylinder, as a pair, the cylinder slips off.
You said your's is sticky (turning the cylinder?). I've had a similar situation that required some twisting & pulling to get the cylinder off of the yoke's barrel because of excess carbon build-up on the yoke's barrel.
You might need to spray some lube to help get it softened up & off but once you've cleaned the yoke's barrel, with some fine Scotchbrite, wipe off any lube left. That'll only allow it to get sticky sooner if left on.
PS: You might want/need to clean the inside of the cylinder's tunnel (for the yoke barrel). A bronze cleaning brush for a .38/.357 fits nicely & cleans out any carbon residue in it.
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