I have a few of those clear, red snap caps with the brass looking base for 9, 40, and 45. They are made by Armsport I believe with the spring in the middle. After dry firing only about 75 times, I noticed there is an indention in the "primer" as deep as a normal primer hit. Does this mean the snap caps are no longer useful for their intended purpose? Is there a way I can fill in the little hole caused by the firing pin? Any help is appreciated, as usual.