You might get more information if you state your concerns and questions to the semi-auto forum in general, but this forum no doubt has an expert or two on anything Smith& Wesson.
I know, for instance, they are a refined version of the S&W model 39; in two or three "dash" variations. They came new with a special bushing wrench and two magazines; that are restricted to only one type bullet nose profile, of a maximum five per magazine.
That bullet is a flush seated .38 special, flush seated to the mouth of the case.
Most, (not all) functioned flawless....Seems I heard, not all (??) parts are interchangeable within the "dashes", but I can not testify to that.
As for the "expert" comment. If you put all the experts over yonder on the westward horizon, and then look over to the eastern, "non-expert" group; I'll be over on the eastern side,... with the larger crowd.
Agree with everything he says--a few more comments--I had a 52-2 for a few years--you might even find some old posts of me here. "No dash" was the earliest, then the 52-1 then the 52-2.
The cartridge is called a "wadcutter" and guns that shoot them are often called "wad guns". completely flat nose bullet, flush with the end of the shell. Has an inverted cone base inside the shell. Reminton for one still makes this ammo. Box will say "38 Special / 148 gr. Wadcutter" on the end.
Accuracy--The only thing my gun was missing was the test fire target. Did some research and in the manual and the gun was guaranteed to keep 5 rounds in the 50 yrd. 10 ring off a machine rest before it was shipped--my manual did not give it in inches, so you'd have to measure an NRA 50 yard CF pistol bull to find out.
Next, they can have feed issues, just like a High Standard, you may have to adjust the feed lips of the magazine. One of my 6 mags fed the bullet nose high and the center of the slug hit the top the chamber--I slightly bent the top of the magazine feed lips inwards a few thou. and it was fine ever after.
Also, the 52-2 was the "good one". It had a modified extractor as the earlier versions were prone to break. I've heard from a few people that a Mod. 39 extractor can be made to fit, but don't have any leads on who does it, and I hear 39 extractors are now like hens teeth to find as well.
There was one guru, Jim Barta, aka RoadRunner, but he passed @ 2 years ago. Don't know anyone else at this time. His links for the Smith 52 are now gone nearest I can find.
They are incredibly accurate, but they can be bear to shoot well, again, IMHO. A "trick" I learned is to hold it in a very tight grip--worked for me. In fact, I'd heard two recommendations for this gun. 1) Run it wet, until the oil spatters your glasses. (An exaggeration I'm sure). 2) "Grip it like you were squeezing the oil out of it". I heard but am not sure that the tight hold was due to the low pressure round, which made the action cycle slowly and so you were subject to muzzle flip before the bullet left the barrel, slide action, and the need to keep a good followup hold as well.
eBay for an OEM manual, or Rediscovered Shooting Treasures for flawless reproductions--Here at these two links;
Backgrounds & Buttons
http://www.rediscovered-shooting-treasures.com/index.htm
Ultimately sold it as it was hard to shoot well and I modded my Beretta 92 for bullseye (like the current Army team guns, and I needed a 45 for pin shoots and needed the funds. Just didn't shoot it enough to keep it.
Do I regret selling it? You betcha! Just a gorgeous firearm--mine was complete with barrel weight, box, papers, 6 mags and all. Some day I'll look up the local guy I sold it to and see if he still has it and will sell it back to me.
Hope this helps
Steve