He doesn't have Naruto level charka capacity. I don't think that's possible without some kind of special Kekkei Genkai or being a Jinchurikin since the day you were born. I'd say that at most, Shinka has Chunin levels of chakra. As for chakra control; well, Sakura had good enough chakra control to complete the tree climbing exorcise in one try, despite the fact that we hadn't seen any indication that she had put any significant work into her chakra control. Am I saying that he's at Sakura's level? No. I'm just listing a cannon example of insane chakra control from someone without any kind of special power