He may not do that because he secretly knows it won't solve the problem.
That's true - I think what some folks don't or forget to realize is there is more than one problem here. If Walmart employees tip off their buddies when the ammo is in, I guess there's really nothing you can do about that, but I often beat them to the store.
The big(er) problem is when employees play games with the ammo in order to supply their buddies - hiding ammo under the counter, denying it's in stock (only to have someone up the chain bring it out from the warehouse), and telling customers there is none, only to sell some to the next customer that walks up (which happens to be one of their buddies).
I've seen all three happen on numerous occasions.
If you've got insiders at work, putting ammo out at various times of the day will not only NOT solve the problem (they may now have the flexibility / discretion to keep the ammo in back until their buddies arrive), but it will also deny folks like me (non-insiders) the chance at it, since I and other non-insiders would never know when it was being put out.
As I've told other outsiders like myself, all you can do is show up at 7am (or earlier) when the ammo is supposed to be rolled out. If you don't have some way of finding out when the ammo has arrived, you're still wasting your time, as you can arrive at 6:45am every morning for weeks with nothing arriving - the day it does arrive, when you roll in at 6:45am, you'll then find a line of insiders have beat you there, as they've been given a "heads up" on the day the ammo has arrived.