The 40mm guns proved to be effective against massed infantry attacks.

The downward-firing guns proved to be of little use, being almost impossible to aim.

The gun proved inadequate and was produced in small numbers.

The gun proved successful, and was the standard equipment of Australian field batteries by 1943.

This gun proved of the greatest service to us afterwards in shooting game for the pot.

We shall plant the right guns to prove our case.

The gun was a new design from Armstrong, but proved a failure a few years after its introduction.

The gun proved to have remarkable accuracy and uniformity of pattern.

In addition, the gun proved to be too powerful for the limited confines of the Potomac.

The gun proved to be an accurate and deadly instrument.