Are you suggesting Massachusetts DOES have a limit? I've never heard of such a thing.
If so, what is it? Is it set by total rounds? By caliber?
Around 25k or 30k rounds. (10k rf, 10k cf & 5k or 10k shotgun?)
http://www.northeastshooters.com/vbulletin/showthread.php?t=24364&highlight=ammo+permit
Blatantly plaigerized from someone else's post:
(1) Exemption: License, Registration, or Permit: In accordance with the provisions of M.G.L. c. 148 § 13, the Board hereby prescribes the following quantities of explosive materials that shall be exempt from License, Registration, and Permit and may be kept, or stored in a building or other structure:
(a) Small Arms Ammunition
1. Not more than 10,000 rounds of rim fire ammunition.
2. Not more than 10,000 rounds of center fire ammunition.
3. Not more than 5,000 rounds of shotgun ammunition.
(b) Small Arms Ammunition Primers
1. Not more than 1,000 caps or other small arms primers.
(c) Smokeless Propellants
1. Not more than 16 pounds.
2. Persons under 18 years of age may not keep or store Smokeless Propellants.
3. Not more than two pounds of such propellant shall be stored in a multiple family dwelling or a building of public access.
(d) Black Powder
1. Not more than two pounds.
2. Persons under 18 years of age may not keep or store black powder.
(e) Exempt quantities of small arms ammunition, primers, smokeless propellants and black powder shall be stored in original containers and such containers shall be stored in a locked cabinet, closet or box when not in use.