I had my 1948 K22 out at the range on Thursday. Noticed something a bit off on it for the first time. About half the time it operates perfectly, smooth as butter. The other half of the time the trigger binds up about half way through the double action trigger pull. It gets pretty darn hard to pull. You can pul through it though and it still fires and cycles the cylinder. This same think happens when cocking the hammer manually, about half the time it's really hard to pull that hammer back.
I keep the gun real clean but just basic cleaning. I've never had the side plate off and worked on the internals.
Any ideas or advise?