Sentence Correction

1. A cannon shooting dead chickens at airplanes has proved helpful to
demonstrate what kind of damage can result when jets fly into a flock
of large .

2 . A cannon that shoots dead chickens at airplanes has proved helpful
in demonstrating what kind of damage can result when jets fly into a
flock of large.

which one is right?


I think that second one is right. In first one, present participle
phrase indicates ongoing action with respect to the main action of the
principal clause. hence, it indicates that the cannon is still
shooting dead chickens ......Because the present participle used here
does not indicate when the action happen , it only shares whether the
action has been done or not.

had it been......

1.A cannon shooting dead chickens at airplanes proved helpful to
demonstrate what kind of damage can result when jets fly into a flock
of large .

It would have been right. As it indicates that the shooting
..........remains during the time when cannon proved helpful...i.e.
both actions coexist..

it means we can not use present participle when the main verb of the cluase is in present perfect?