Again, HOLY THREAD REVIVAL, BATMAN! This one had been to bed about 18 months it appears.
But now that it's out of the crypt and appears to have a life of its own, Yes, Bangor Punta models need to be treated carefully, not fully avoided, but at least treated with more suspicion. I will give some actual figures to back up my statement, and some theories I've heard from credible sources and seem sensible.
The facts:
"Bangor Punta" was in fact a conglomerate, based out of Maine ("bangor" should give that clue). They were known for buying companies cheaply, wringing as much as they could out of them, and disposing of the parts. They were NOT good owners of the S&W brand. They took over in early '66 (they made a hostile take over in late '65) and sold the company in January '84. They controlled the company from '66 to end-'83, more correctly than the previous thread stated and adopted.
That does not mean all years of bangor ownership is to be avoided. For the first years, they did little/could do little to influence quality. Through 1970 or so, little changed in staff and operations. In the latter years, operations were made better, but more on that later.
The observable facts:
I am breaking my observations on modern S&W's down into three phases:
1) Modern Handejectors to 1970 (1900 to 1969)
2) "The Bad Ole' Bangor Punta days" (1970 to 1979/80)
3) The rebirth (1979/80 to 1997)
I have owned about equal amounts in each period (8 to 10 in each period), and examined double that amount or more in shopping and buying. I am basing my comments on grading the quality of the gun not so much on finish, but the qualities the factory imparts on the critical components like Barrel/Cylinder gap, the evenness and uniformity of that gap, the polish and fit and finish of the internals (rebound slide polishing and finish, trigger and hammer fit, barrel crush fit quality, etc.). Based on these criteria, I've found the "average" build quality for period to be:
1) 1900 to 1969 - 8.9
2) '70 TO '78 - 7.4
3) '79 to '97 - 9.0
To back up these observations, I've measured the above mentioned dimensions on these guns, and also subjectively judged how well they were fit. To the degree possible, the wear and tear of years has been minimized as I've collected mostly "little shot" guns that have original finish in a high condition, excellent barrels, and little to no turn line on the cylinder. Not all of my guns uniformly fall into this grading, but 90% or better do.
I have found NO gun before '69 or after '80 that wasn't really well-built, with nice tolerances and good fitting. Between those dates, I find it about a 50% proposition if the gun is well built and to the standards of before and after. Why?
What I have heard and believe is that when Bangor Punta took over, it didn't change things on a dime, so production continued on it's previous course for a number of years. But by about 70, things were starting to fall off. Some attribute it to a drain on personnel from the Vietnam War, others to a lack of re-investment by the new owners. I do agree that by 1970, things were not up to snuff. I have a virtually unshot 27 model from 1971 that left the factory with a beautiful finish, but a forcing cone that Barney Rubble would have ground - uneven, out of spec, and just flat nasty. Being their flagship revolver, this should not happen under any circumstance. But it did, and it did routinely. Numerous models of the J, K, and N frame varied greatly in build quality like this through out the 70s. Excellent examples were turned out, but poor examples were almost as common. A telling fiscal example is that in 1977, according to my memory, S&W under Bangor Punta reported 18.4m in net profits on like $84m in sales. That's a ridiculous amount of retained profits without re-investing it into the business. Something was being strangled, and it wasn't a Springfield, Mass. chicken.
By the very late 70s, these problems were getting known and grumbled about by customers and dealers, and the company invested much money into CNC machinery, as well as launching a competitive product to fight the Colt Python. Launched in 1980 on new machinery and to tight standards, the 586/686 was a new flagship and standards were ramped up to deliver a great product. The implementation of CNC techniques throughout the assembly line meant, despite less individual attention, the quality of produced guns started to go back up.
These observations I've repeated from gunsmiths, factory workers and collectors conforms to what I've seen. I treat any gun from the very late 60's to about 1979 as very suspect and won't by one sight unseen unless I know the seller is very knowledgeable and can describe it's condition to high standards, or I examine it in person. Lastly, the '70s era guns also labor under the burden of having been shot quite a bit - agencies were more liberal with their ammunition and training budgets, and it requires you be able to sort out the guns that were shot to the point of wear, or left in the holster and used infrequently. That requires a practiced eye.
I think Bangor Punta guns need check-out like any gun, but you will find the '70s era guns to fail more often. Be careful when buying, but don't run away.