So after watching people shoot padlocks on youtube, the answer is it depends on the lock. If it's a standard, cheap padlock, it'll come loose if you shoot it in the right spot with 1 or 2 shots. If it's really heavy duty though I don't think it'll come loose unless you shoot downwards point blank, which is risky as shit, and even then it might not work.
I liked the idea this game was going for, it was just executed poorly. Like, it was basically look at how good all this shit looks and Uncharted gameplay ugggh. Like Grayson is badass. He's the British Marcus Fenix. I love my mustachioed knight from across the pond. I love that it's parrelel to our world but its got cool shit like steampunk weapons and monsters.