problem with my 4in model 19
hey everyone.......i was given a model 19 for free by my father and a problem just happened. the cylinder keeps getting caught up when i try and open it to eject the shells. i have to use alot of force to get it open. it rotates perfect when firing though. anyone know what can be causing this? i took it to a gunsmith and he did a minor adjustment for free, but it only fixed the problem for like 75 shots. any input would be great, and if anyone knows how to fix this, that would be great too. thanks!