Been there myownself; and of course a long seemingly pointless story follows...
For those who missed it (and probably they are legion); my older son-in-law and I were tasked to find "a Smith and Wesson .357 just like Mom's!" for the older daughter's birthday present. A .38 Spl was not to be considered 'optimal', so of course we found a plethora of Model 14's and 64's. Auto-loaders were out; as the daughter had enough troubles meeting her quarterly quals with the M9 service pistol. (I can't accurately shoot a Beretta 92 either; daughter and I are agreed that that particular platform is biased against lefties, no matter our political bent!)
So it ends up that, three fruitless days after her birthday, her husband and I were at a little gunshow at the County Fairgrounds in Atlantic, Iowa; and back in the darkest corner of a display case lies this pathetic-looking 4" barrel Model 66, the stainless version of the Model 19 Combat Magnum. "Grungey-looking" was the best AND the most generous description I could attribute to the poor little thing; dirty, smoke-tracked and with some myterious "growth" in the bore. I talked the dealer out of a bore brush and some Hoppe's to see if the bore would clean up. I think he knew he had a couple of rubes on the hook when we came back 4 times to look at the revolver. 15 patches and half an 8-ounce bottle of #9 later, I had a feeling that there was 'some promise'.
Lord I hoped so... that 1986-vintage wheelgun ultimately cost me (my half of the purchase price) $10 more than the full cost of my wife's NEW Model 13 M&P some 16 years before!
The results proved out when we loaded her up with some full-jacket ball and let 'er rip. If I had the ability to stuff my entire face and a Gillette razor into the barrel along with my bore-light; I could have shaved my whiskers without too much blood-letting. I think that, somewhere in it's lifetime, that sweet little .357 had been stuffed with reloads charged with Unique and with slugs cast from the same dead-soft lead Hornaday uses in their .451 and .454 roundballs.
So, "Gee Wizz!"... it's gonna take as long as you are willing to spend in time, hopefully not money. And we're all pulling for you.