Well, yes and no.
When the action starts to open. The bullet is long gone. So, felt recoil is experienced after the bullet has hit the target. But the reaction an motion start the moment the primer ignites.
But to see if you are flinching or not, get some snap caps and dry fire pointing at a blank wall. If the sights move when you release the trigger. You are doing it wrong.
Repeat the exercise countless times everyday until it doesn't happen anymore.
PS. WWB has been crap lately, ECO I don't know, you should be allright with the 115 gr S&B