UPS regs on ammunition shipments:
ht tp://www.ups.com/content/us/en/resources/ship/packaging/guidelines/firearms.html
Special Procedures for Shipping Ammunition
UPS accepts for transportation such ammunition as constitutes "cartridges, small arms," as defined in 49 C.F.R. § 173.59. All other allowable ammunition shipments are accepted only on a contractual basis, and must be prepared under the rules for a fully regulated hazardous material. Ammunition cannot be shipped where it exceeds 12.7 mm (50 caliber or 0.5 inch) for rifles or handguns or 8 gauge for shotguns.
The shipper must comply with and must ensure that each shipment containing ammunition complies with all federal, state and local laws applicable to the shipper, recipient, and package, including, without limitation, age restrictions.
Use These UPS Services for Your Ammunition Shipment
In order to meet the exception for "Limited Quantities" shipments or ORM-D materials, which are not subject to the shipping paper requirements of subpart C of part 172 of 49 CFR, ammunition can only be shipped via UPS Ground, and only within the 48 contiguous United States, or via UPS Ground Intra-Oahu and Intra-Alaska. Shipments of ammunition with other UPS services must be prepared as fully regulated hazardous material and are available only on a contractual basis.
Ammunition is not accepted for shipment internationally.
Packing and Labeling Requirements for Ammunition
All ammunition must be shipped in new corrugated packaging which meets the UPS Single Wall Box Strength Guidelines. Ammunition must be packed with internal boxes or partitioning or in metal clips. The internal boxes, partitions or clips must fit snugly into the external packaging that is securely closed so that it cannot open during transportation.
Ammunition will be transported only when packaged and labeled in compliance with 49 C.F.R. Part 172, et seq. regarding hazardous materials shipments, and must be shipped in accordance with the UPS Guide for Shipping Ground and Air Hazardous Materials.
For additional information regarding packaging and labeling requirements, refer to "How to Ship Ammunition (Cartridges, Small Arms)," at the link below, or contact UPS.
How to Ship Ammunition
Getting Your Ammunition Shipment to UPS
Packages containing ammunition may be tendered to UPS through a UPS pickup or by dropping off at the various locations accepting packages for shipment by UPS. However, do not deposit shipments of ammunition in a UPS Drop Box, as hazardous materials are not permitted to be deposited in UPS Drop Boxes.
See the UPS Tariff/Terms and Conditions of Service applicable to U.S. shipments for information regarding firearm and ammunition shipments
UPS and ORM-D labelling:
ht tp://www.ups.com/content/us/en/resources/prepare/packaging/guidelines/ammunition.html
(original page has label images you can use)
Shipping Ammunition
How to Ship Ammunition (Cartridges, Small Arms)
UPS accepts for transportation such ammunition as constitutes "cartridges, small arms," as defined in 49 C.F.R. § 173.59. All other allowable ammunition shipments are accepted only on a contractual basis, and must be prepared under the rules for a fully regulated hazardous material.
Ammunition will be transported only when packaged and labeled in compliance with 49 C.F.R. § 172 (Hazardous Materials), and must be shipped in accordance with the UPS Guide for Shipping Ground and Air Hazardous Materials. To meet the exception for Limited Quantity/ORM-D, ammunition can be shipped via UPS Ground only within the 48 contiguous United States, UPS Ground Intra-Oahu and Intra-Alaska.
To qualify as "Cartridges, small arms ORM-D" or limited quantity, ammunition must be:
Ammunition that does not exceed 12.7 mm (50 caliber or 0.5 inch) for rifle or pistol cartridges or 8 gauge for shotgun shells; or
Ammunition with inert projectiles or blank ammunition
How to Package Cartridges, Small Arms
Ammunition must be packed in inside boxes, partitioned within a snugly fitting outside box or in metal clips. Cartridges must be properly cushioned and protected from accidental initiation. The inside boxes, partitions or metal clips must be packaged in securely closed outside packaging that will not open during transit. The package may not exceed 66 lb. (30 kg).
Is a Hazardous Materials Label or Marking Required?
Yes, (until December 31, 2020) packages that meet the definition of Cartridges, small arms must be marked with the proper shipping name "Cartridges, small arms", and designated as "ORM-D". Materials marked "ORM-D" and shipped by UPS Ground within the 48 contiguous states, UPS Ground Intra-Oahu and Intra-Alaska do not require hazardous material shipping papers. This marking may either be in the form of an ORM-D sticker, or written by hand. If written by hand the letters "ORM-D" must be enclosed by a rectangle that is ¼" larger on each side than the designation "ORM-D". (Note: The image below can be printed, cut out, and securely taped to the box with clear packing tape.)
Print the ORM-D or Limited Quantity marking and securely affix to your package. If using the limited quantity marking, please place on package as a "square on point" or "diamond".
Getting the Package to UPS
Cartridges, small arms may be shipped only through a UPS Scheduled Pickup Account (specifically, Daily Pickup, Daily On-Route Pickup, UPS Smart Pickup®, and Day-Specific Pickup), or through a UPS Customer Center (counters at UPS operational facilities). Note: Cartridges, small arms are not accepted for shipment via UPS Drop Boxes, at locations of The UPS Store® or any third party retailer.
Will I Pay An Additional Fee For Shipping Cartridges, Small Arms?
When shipping ORM-Ds or Limited Quantities of hazardous materials by UPS Ground within the 48 contiguous states, UPS Ground Intra-Oahu or Intra-Alaska, only the standard shipping charges apply. There are no "accessorial" or additional charges.
Important Additional Information
Ammunition may not be packaged with firearms
Ammunition may not be shipped to individuals under the age of 18
Ammunition is not accepted for shipment internationally.
For additional information regarding firearm and ammunition shipments, see "Shipping Firearms or Ammunition," at the link below, or contact UPS.