MGL 131-67 doesn't mention hunting, because per MGL 131-1, it isn't hunting:
It's not a hunting law, it's a natural resources law.
While the law isn't labeled under 'Hunting' and is labeled under 'Natural Resources' like you say, I think the intent is for hunting because every other section in 131 is regulating hunting and fishing or protecting natural resources.
The no larger than .38 caliber night time possession coincides with the restriction for hunting possum and raccoon at night with nothing larger than a .38 caliber handgun.
I know that what I think means absolutely nothing legally.
How does one go camping and carry a CCW greater than 38 caliber. They can't. What is the intent of the restriction.
5. Black bear may be hunted with handguns only during the September portion of the open season. The only handguns lawful for the hunting of black bear are the .357 Magnum revolver using .357 Magnum ammunition, and other revolvers chambered .40 caliber and larger.
So when bear hunting and walking in or out before 30 minutes before sun rise or after 30 minutes after sunset with your .44 magnum revolver, you are breaking the law because you have a .44 handgun during prohibited hours, simply because you are walking in or walking out at night?
How about on a hunting camping trip? You are legally hunting during the day with a handgun chambered for greater than .38 caliber and now the sun goes down and you are sitting around your campfire. That is now illegal?
How about doing a multi-day trail hike in MA and with your CCW and LTC-A. When the sun goes down you are now in violation of the law with your .40 concealed glock?
I know some of the laws in MA do not make any sense.
Has anybody ever been jacked up for having a CCW and a LTC-A in the woods after dark larger than .38?
MGL 131,Section 58. A person shall not discharge any firearm or release any arrow upon or across any state or hard surfaced highway, or within one hundred and fifty feet, of any such highway, or possess a loaded firearm or hunt by any means on the land of another within five hundred feet of any dwelling in use, except as authorized by the owner or occupant thereof.
According to this, it is illegal to be in possession of a loaded firearm on the land of another within 500 feet of any dwelling in use without permission of the owner or occupant.
So when I CCW with my LTC-A and I shop at the local grocery store that is within 500 feet of an occupied dwelling or I visit a friend and get out of my car in his driveway and his neighbor's house is less than 500 feet away, or I walk across the parking lot at the local library or walk down the street on the sidewalk etc etc etc, I am violating this provision? I think most people would agree, it applies only when hunting, even though it doesn't say that. Just like the being in possession of a handgun chambered greater than .38 after dark in the woods.
I am not an attorney, my opinion matters to no one but me, none of my opinion is advice and my opinions should be completely ignored when it comes to MA laws.