I ran into this at a ups store here I TX once and they said they couldn't ship it due to policy.
So, The last scope I shipped, i took to a ups store but with a different approach. I stuck it in the original box and added extra bubble wrap to fill empty space. Then I wrapped up the original box in packing materials, and placed that in a larger box filled with more packing materials to fill empty space. I then taped the snot out of that box. When I took it to a ups store, and they asked what was inside that I was insuring for almost $3k, I did not tell them it was a NF ATACR F1, but instead told them it was a telescopic lens. It wasn't a lie. It also didn't hurt that the guy I was shipping to had "Hubble" for a last name!