Which has greater inertia: a 1-quart milk carton filled with feathers or the same carton filled with buckshot?

The carton filled with buckshot has the greater inertia.

Explanation:

First we have to find how inertia is determined.

''The inertia of an object is determined by the type of material from which object is made and by the amount of that material contained in the object''

If we look at this statement we can easily find that buckshot has greater inertia than quart milk. buckshot is made up of metals.

metal has a high inertia

So according to this statement buckshot has the greater inertia then quart milk.