Oh, you want to account for inertia? Lets look at the TKO numbers then. Add the three, carry 4. divide by pi........
158gr .357 TKO of 10 at the muzzle (1240fps)
7gr Pellet TKO of, ugh 0 says the calculator. must be an error. error. error. error. error.
Edit: Just did manual calcs and got .97 TKO. Just enough to knock a fly on it's ass.