I got one in today with the problem of light primer hits. The gun was inherited from father and has not been fired for about 10 years prior to taking a concealed carry course with it. The customer bought Aguila .380, 95 gr FMJ. I did the pencil test (pencil down the barrel, pull the trigger and see how high the pencil goes), and the pencil jumped about 3/4". My KelTel P-3AT kicks the pencil out of the barrel. I suspect main spring is weak. Thoughts?