What are you using after nutpunch?
To get some nice, guaranteed, and easy (which is unfortunately necessary if you play online) chip damage with a single run cancel, I suggest using:
4SKRC, 333nutpunch. It does 6,88% and doesn't have any gap. 4SKRC might be something like +30 on block lol.
f3[4]RC, b34SKDC, f4, f24, d1, nutpunch does 29%, + 7% on block you can get 36 meterless midscreen.
f3[4]RC, b34SKDC, f4, f24, d1, EXnutpunch, f3nut does 35%, + 7% on block you have 42% for 1 bar.
I am getting disappointed by the 11 string because the 1 gets ducked by most (maybe all) characters when the opponent blocks low; Even cancelling something into exfireball on block sucks, because small characters duck the fireballs while blocking low...