That movie is funny, but not in any way accurate or truthful. Half of the story is Boyd’s bitterness at having his own designs laughed at and the other is him not understanding how procurement and testing even work.

For example, in the move the protagonist discovers that vehicles meant for destructive testing had their fuel replaced with water and dummy ammunition. Boyd frames this as cheating to minimize possible secondary explosions. The reality is that fuel and ammo are removed from these vehicles so that they can be studied afterwards more easily. Penetrations into the magazine or fuel tank are easier to see when those components are not confetti.