Re: JC Higgins Model 60 Auto Loader
Though I do not have any experience with the Higgins model I do know that most auto loading shotguns require some adjustment to reliably cycle when going from a heavy load to a lighter load and vice versa. (Do not shoot heavy loads on a light load setting, you'll crack the fore end.)
How your particular model is adjusted I do not know. Most times is a matter of moving a bushing or flipping a spring. Sounds to me though that you may know how to adjust yours, you were just questioning if it needs adjustment or if there is something wrong.