I got them for my t3 super light in 300wm. Heard lots of good things about them so I was pretty surprised when sighting in at the range on the 4th shot my scope flew off. I had torqued the screws to there specs, the screws pulled the threads and were left in my reciver. When I called them we came to the conclusion that they had been packaged with the wrong length screws so they sent me the right ones. No problems since, just make sure you get the right length screws.