I had to send a new SP101 back 3 times recently. The barrel was screwed in too far, and, obvious as it was, I didn't notice it when I purchased it.
Return 1: Ruger "repaired" the barrel. The SP101 came back with a 12 mil barrel cylinder gap because it was repaired by screwing the barrel out. End shake was 6 mils on the cylinder to boot-not exactly sterling fit up.
Return 2: Ruger replaced the cylinder to correct the barrel cylinder gap and end-shake. Problem is, it was sent back to me with the same gap and the same end shake. The "new" cylinder was a peice of work too (roughly enlarged/ovaled on the breach end in an attempt to match a bad ejection star). When I called customer service, I was told it was shipped back with a 6 mil gap and 3 mils of end shake, perfect cylinder, etc. so....
Return 3: I shipped the gun back with my feeler guage between the cylinder and forcing cone in the case. Told em to fix it or keep it, because I couldn't in good conscience sell the POS used, and it would be irresponsible to toss it in the trash.
Well, I have it back again with a new barrel. At least the barrel cylinder gap is down to a loose 6 mils. End shake is the same, cylinder is the same-but at least the chambers are reasonably tight at the exit end of the cylinder if not everywhere. Ruger also smoothed out a lip in the hammer well that the falling hammer could catch on (I think somone "slipped" cutting the hammer well out, because mine was much wider than any other SP101's I compared it too).
I've owned quality Ruger's in the past, but I concurr that they've gone down hill. Personally, I think the quality decline might have something to do with the S&W boycott taking some competitive pressure off Ruger-less incentive now to turn out a quality product.