It worked for launching things into space. It did not work as a weapon for the various reasons the wikipedia article points out. What got him assassinated is m

It worked for launching things into space. It did not work as a weapon for the various reasons the wikipedia article points out. What got him assassinated is more likely his other work referenced on his Wikipedia page: >The Iraqis then told Bull they would go ahead with the project only if he would also help with development of their longer-range Scud-based missile project. >Watching development of the gun, Israel feared it could be used to launch nuclear weapons, but the re-designed Scud missiles were of greater concern at that moment.