I recently picked up a 340PD at a very attractive price. Everything checked out with my basic inspection but apparently I missed an issue with the ejector rod. What's happening is, when two particular chambers on the cylinder are facing to the left of the gun, about 75% of the time if I hit the ejector rod it will stick. It's also a bit stiffer to push. It'll go all the way out but on the return it'll hang up about a quarter inch from fully flush. Rotated to where any other chamber is facing to the left, it works as normal.
Any idea what this may be and what I'd need to replace?