Yes, but no. That's the wrong argument.
The right argument is that they curtailed their employees 2a right to self defense, and in doing so took on added responsibility for the safety of their employees, which they failed to adequately provide for.
The argument to make is that gun free zones transfer liability.
Given the bulk of components and the weight of some of them, you may actually be able to buy and stack more not reloading. The sweat equity discount may not just be small, it may be non existent or negative. You have to look at your supply chain.
Last time I looked into it was during the last panic. Even then, while 12ga became less plentiful and more expensive, it never became less plentiful and accessible than components.
For me there was an added space component. Keeping component stock encroached into things like my storage of powder for pistol and rifle and used it's portion of that budget inefficiently. It just didn't work out, it was cheaper and more effective to just buy cases of ammo and store them.