Howdy
Welcome to the wild and wacky world of confusing Massachusetts gun laws.
Perhaps someone who has lived in Massachusetts for close to 50 years and has seen many changes in MASS gunlaws over the years should chime in here. Someone with direct experience with MASS gunlaws.
On October 21 1998 the Massachusetts Attorney General released a set of public safety standards that all handguns sold in Massachusetts must meet. The Gun Owners Action League of Massachusetts sued the Attorney General at that time, but the only concession the courts made was that handguns registered in Mass prior to that date that did not meet the new safety requirements could still be sold in the state. Note that these safety standards were not enacted by the legislature, they were simply published by the AG one day under his own initiative. In other words, the legislature has no say over these standards.
Here is the gist of the safety standards. Pay particular attention to the second bulleted item about being prone to accidental discharge as measured by drop testing
Design Safety Standards for Handguns in Massachusetts | Giffords Law Center to Prevent Gun Violence
Pay particular attention to the safety standard of handguns being prone to accidental discharge if dropped on the hammer. That is the key to what we are talking about today.
The ONLY single action revolvers legal for sale in Massachusetts are those made by Ruger with a transfer bar that positively prevents an accidental discharge if dropped on the hammer. None of the other manufacturers of SINGLE ACTION revolvers, Colt, Uberti, Pietta, and yes Smith and Wesson have models that are approved for sale in Massachusetts. Yes, the Schofield model is a single action revolver. You have to cock the hammer for every shot.
The regulations required all handgun manufacturers who wanted to sell their products in MASS to submit THREE samples of each model to the state for destructive testing. It gets more complicated than that, because the state decided that each different SKU number constituted a separate model. So the same model with different barrel lengths had to each be tested to destruction. So none of the manufacturers opted to send any revolvers to Mass for destructive testing, instead preferring to write off any sales in Massachusetts.
EXCEPT RUGER! Ruger wrote a letter to the AG stating that all their models would pass the destructive tests because of the transfer bar. In addition, Ruger went to bat for MASS FFL dealers stating that they would foot the legal bills for any dealer who sold a Ruger product that the state decided to take to court.
The AG blinked, and almost all Ruger revolvers are now legal for sale in Massachusetts. Not quite all, but you can go to the Ruger website and see which ones are 'Mass Compliant' and which ones are not.
That is why I will never say anything bad about Ruger, because they went to bat for all Massachusetts gun owners while the rest looked the other way. Ruger still submits models to the state for destructive testing so they can be legally sold in Mass. I shudder to think how much that costs.
Back to the question at hand.
Here is the most recent list of handguns approved for sale in Massachusetts. Scroll down to Sturm Ruger and see how many there are. Notice there is nothing on the list made by Colt. Scroll down to Smith and Wesson, and despite the fact that many S&W models are MASS Compliant, you will not see the Schofield Model of 2000 listed. That is the one the Original Poster was asking about. Sorry, not on the list. I suspect S&W did not bother to submit it because they knew it would not pass a drop test. Drop it on the hammer with a live round under the hammer and it will probably fire. So will a Colt, and most of the modern replicas of a Colt. Bottom line, the Schofield Model of 2000, which S&W made around the year 2000, is not Mass Compliant and cannot be sold in Massachusetts.
https://www.mass.gov/files/documents/2019/06/19/Approved Firearms Roster 05-2019.pdf
Do not buy the S&W Schofield Model of 2000 or any of the Italian reproductions on line or at an online auction. The gun will have to be shipped to an FFL in Massachusetts, and any FFL in MASS who knows the Mass gunlaws will not accept it. Then you will be stuck having to ship it back to the seller and trying to get your money back.
Your best bet to buy a Schofield, or any of the other S&W Number Three Top Breaks in Massachusetts is to buy an antique. Forget the bit about not being allowed because the ammo is still manufactured. That is an interpretation of Federal gun laws I hear all the time. Every dealer I am familiar with has no problem selling an antique revolver (manufactured before 1899) in Massachusetts, regardless of whether factory ammunition is still available. All original Number Three Top Breaks are considered antiques because all frames were manufactured before 1899, even though they may have been sold into the 20th Century. You can thank the S&W historian Roy Jinks for that. Mass follows the example of the Federal gun laws regarding antiques, but just to be different it has to have been made prior to 1898, rather than 1899, to qualify as an antique in Mass.
I also suggest in addition to getting your MASS License to Carry you look into getting a Curio and Relic license. This is a Firearms License issued by the BATF for collecting purposes only. With some exceptions, most firearms that are at least 50 years old are legal for a C&R holder to buy. A C&R is not for doing business, it is not for making a profit. It is only for collecting purposes. C&R holders are required to maintain a bound book. All firearms bought under your C&R are recorded in your book, and any you also required to note when you have disposed of any. A C&R license allows you to walk into any dealer anywhere in the country and walk out with a firearm on the C&R list. Mass residents are required by the state to register their C&R purchases on line with the state. A C&R license allows you greater access to firearms that may or may not be listed on the official AG's approved list.
Lastly, I strongly suggest you join the Gun Owner's Action League (GOAL). For a small fee you will receive email notices every week regarding legislative activity in MASS that gun owners should be aware of. Remember, it was GOAL that sued the AG in 1998.
Gun Owners' Action League of Massachusetts - GOAL.ORG
Any questions you have about Mass gunlaws call the Goal Office and ask for Jon Green. Best to join first.
The NRA does not do squat for MASS gun owners.
P.S. Forget about buying an AR15 in Massachusetts. The current AG shut down all AR sales in Mass a couple of years ago. Again, nothing the legislature passed, she did it on her own initiative in the name of public safety.