I may have posted about this before but I can't find it now.
I have a 642. the cylinder is very hard to rotate when it's open, and I assume also when it's closed meaning it could be affecting trigger pull.
When I manually rotate it with my hand it frees up a bit, but goes back to sticking. I seem to recall that I've tried to lube some places to get it to spin more freely but to no long-term avail.
I rarely even touch the gun, let alone shoot it, but I thought it might make a good companion for anti-social distancing during a trip to town tomorrow, so I thought I'd try to un-stick it again.
if that doesn't work it'll be a Keltec P-32 in the pocket, as much as I'd rather have the .38