What's the point? Why shove ammunition into a civilian plane, and even some apparently defective) since it can detonate so easily during a regular flight), if you can supply ammunition to your military units in the usual way, as they do?
Purely in theory, of course, everything is possible, but in fact it is very unlikely.
The plane was neither military nor cargo, but passenger, moreover, with people on board. And people could not leave without their belongings, I am already silent about the requisites for the performance of ballerinas and medicines. And the ammunition is heavy. Physically, it would hardly have worked.
Secondly, there were civilians on the plane - if they saw it, it would be a disclosure of military secrets and a complete disaster.
And finally, the probability of a random detonation of ammunition in the 21st century it is extremely small, if some experimental superweapon was not transported there. ¯ \ _ (ツ) _ / ¯