Hello, I see that you run into the exactly same problem as mine.
I found yourself repeatly doing these actions, especially in CRM email system. I searched Gmail-Auto-BCC for a while, then I found a browser extension which helped me to automate this task.
It got a bunch of extra features, set up multiple Bcc addresses for multiple Gmail accounts, pop out reply/forward mail, maximize compose form...
The Chrome extension on webstore: https://chrome.google.com/webstore/detail/hfjgikgjcgdhlklibkcobckkhklaeodd
You can read full details and download FIREFOX addon or SAFARI extension on this blog post: http://blog.afteroffers.com/automatically-bcc-gmail-emails-chrome-extension/