I have no idea if seagulls are protected or not.
But the idea of shooting a 7 mag from a boat on the water, with the possibility of other boats around, and ricochets of the water, would give me pause. I would think a shotgun shooting shot would be better anyway. I have no idea of whether you'd need non-lead shot or not either?
I'm just thinking about it from the angle of shooting prairie dogs across a great big meadow, and wanting cartridges/bullets combos that will not carry ricochets for long distances.
Not sure if this helps you or makes it worse?
