Burris xtreme tactical bases for sako 85?

[5RWill]

Anyone ever use these? I picked up some to mount our V6 on our Sako 85 260. The rear mount went on normally and had to be malleted into position due to the dovetail. The front rail slid way forward onto the front of the receiver like the dovetail wasn't engaging. But there are set screws on these rails. Burris says torque to 35in-lbs. Well the front was mobile by all means less I slid it to too forward. So I torqued the set screw in place with locktite. But don't feel like this is adequate for holding under recoil.

Has anyone used these?