I have used these for about 40 rounds of 6.5 creed on a Tikka T3x CTR factory rail and they are just so close to the barrel that I can’t get the eye relief where I want. I bought a Unimount instead. Still on the rifle but pulling them in a little bit. $130 shipped PayPal friends and family or you add the fees. Perfect shape. Still have the factory box with $170 price tag on it