From my T49 tank tree, seems to be that the Hellcat is 27k in experience. In the American tree, the Hellcat is actually 23K in experience. Look at these pictures and in the game itself for proof - https://ibb.co/ciniLa
https://ibb.co/b5yCDv . Developers I found an error and there might be similar ones like this out there. Please read topics and reply.
Update - The developers may have rounded the experience it's actually 23,880. Click here - https://preview.ibb.co/ekWeRF/IMG_0531.jpg .
Edited by Amphitrek, 11 March 2017 - 08:25 PM.