I decided to try LW Talleys on my Tikka but then I started to read a few reports about the screws that come with the rings not fitting the receiver? The filler screws on the receiver have some sought of black plastic cap which seems to break up when removing them. Some of this plastic crap has to be carefully removed with a pin so as to not damage the receiver threads. Could this plastic have something to do with the complaints that I've been reading about? Obviously if the pastic isn't totally removed, the ring screws will not go in. Just a thought?