I was doing some bench work with my 10" .357 Maximum, and things got a little ugly. Actually, its something that I've never had happen with any of the scoped pistols I've ever owned.
Anyway, I had just bought this barrel, and I had finally found some time to try it out. I fired the first round, and was a little surprised at the muzzle flip. No big deal, so I got ready for the next shot. Just as soon as I squeezed off that second round, it felt as though I'd been hit in the head with a hammer! At first, I thought I hadn't respected the 200gr Maximum bullet enough and the gun has somehow jumped out of my hand (and in to my forehead). Instead, the entire base/rings and scope came off the pistol, recoiled in to my head, and was now laying at my feet in a puddle of blood. After I managed to stop the bleeding (the head is a highly vascularized region and tends to bleed quite profusely), I examined base holes on the barrel. 3 out of 4 screws were completely stripped, while the other one was well on its way to being stripped.
Luckily, there was no serious damage (to me or the scope), and no stitches were needed (a little Dermabond goes a long way on facial lacerations). However, it made me realize the need to check screw holes on all my guns! I'd picked this barrel up used, and it came with the mount and scope all ready on the barrel. It never really crossed my mind to check them, but I guarantee you I will in the future!