I had someone do a trigger job on my 10/22. Other than the trigger its still factory. I took it to the range with the only box of .22 I had handy, a box that had been sitting behind the seat of my truck for probably a year. It grouped nicely but I had a few rounds not fire. The same ammo was running fine in my Buckmark. I don't know if it was the ammo or not. Can a trigger job lead to light strikes? Or was it just coincidence? I can bring it back and have it adjusted if need be...