What do you think of listing the full experience you can get for getting all achievements for a gun? A bit like a win-loss-ratio. 10.000 xp to unlock and then you get 6.000 xp (I'm guessing here) back for all achievements, so you "lost" 4.000xp.
Maybe as another line at the bottom of the table? Something like that. Or at the top where the xp for unlocking is listed. Maybe TOP 3 and Champion could be seperate because those are the ones that are difficult to get and need some practice.
I am always wondering how much xp I get back from the achievements.