I recently purchased (according to forum experts) a 50 year old Mod. 36. Aside from being neglected, I find no evidence it’s been fired more than 50-100 times. Extremely tight lockup on every chamber. I am noticing a small amount of trigger take up during double action, and about the same when cocking the hammer single action. I haven’t owned a S&W revolver in 25 years, and I can’t remember if this is normal. Any thoughts? Thanks.