Live ammunition has never been mailable.
Why would he lie? I’m going by there tomorrow and I will ask him.
Frankly, I can’t recall that ammo has ever been mailable either and my memory goes way way way back. More recently to come into conformance with ATA rules USPS, FedEx and UPS have all tightened up their permissable limits on otherwise prohibited materials. That was a bear learning how to access those rules ~ not very well written ~ which most folks have probably figured out ~ and I mean anything done by DOT or HHS ~just nasty stuff.