What makes a certain cartridge a destructive device is it caliber size or power of the cartridge?

PE, \
i posted a lengthy post on the ATF, and some of the things they consider to be. Best best is to call the local office and ask.
jeffe

I think the general rule is that anything over .500 is a destructive device unless the BATF rules that it is not likely to be used as a weapon, such as 600 NE double rifles.

I think term "sporting purpose" has some application to whether the firearm is a considered destructive device (ie. a USAS-12 vs. a Browning Auto-5).

I tend to disagree with jeffeosso's suggestion to call your local ATF office. The average desk jockey will give you any answer they think will cover their butt and get you of the phone.

If you're curious about a specific firearms, best to write a letter and get the ATF opinion in writing:

quote:

---

27 CFR � 179.24 Destructive device determination.
The Director shall determine in accordance with 26 U.S.C. 5845(f), whether a device is excluded from the definition of a destructive device. A person who desires to obtain a determination under that provision of law for any device which he believes is not likely to be used as a weapon shall submit a written request, in triplicate, for a ruling thereon to the Director. Each such request shall be executed under the penalties of perjury and contain a complete and accurate description of the device, the name and address of the manufacturer or importer thereof, the purpose of and use for which it is intended, and such photographs, diagrams, or drawings as may be necessary to enable the Director to make his determination. The Director may require the submission to him, of a sample of such device for examination and evaluation. If the submission of such device is impracticable, the person requesting the ruling shall so advise the Director and designate the place where the device will be available for examination and evaluation.

Bureau of Alcohol, Tobacco and Firearms
Firearms Technology Branch, Room 6450
650 Massachusetts Avenue, N.W.
Washington, DC 20226

---

In other words a "destructive device" is whatever they want it to be. Wonder if my chainsaw qualifies under that?