The phrase "powerful ammunition" refers to having strong arguments or evidence that can be used to support your views or win a debate or argument.
Sentences with «powerful ammunition»
Where available, as it increasingly is, international law provides powerful ammunition for the enforcement of fundamental rights guarantees. (newlawjournal.co.uk)
It is powerful ammunition in a potential trade war. (fuw.ch)
No adventure is complete without dangerous enemies, so install turrets, craft powerful ammunition, and... BOOM! (gonintendo.com)