Impetuousity

I have a rule question regarding this strategram from the Beastslayers detachment.

In the text of the strategram, I can make a surge move after I was selected as a shooting target. Seems clear.

The rules for surge moves state that I can make a surge move if I fulfill the requirements.

So if I was selected as target of shooting by something that is 3 inches away from my Blood Claws, used this strat, and rolled a four, I end within engagement range and prevent the shooting?

Or I need to get shot first?