I was looking for one to keep individual scores by Date: Shot x broke, = average = class . Plus, it would keep track of round count for maintenance issues. I thought maybe someone had one all ready made up.
There is one on this site, it is listed under fun stuff. At the top of the page, Go to the links button and then go to fun stuff. It is there under trap scores diary or something. There is also a reloading calculator.
I have used it and it is great. It works really well,especialy for big 50 shoots. Cut and paste it to your screen It will keep track of your costs (if you really want to know) also.