I've had good luck with the Brownells bedding/masking tape. It's basically just a good quality electrical tape that's .005 thick. In the hardware store I can never pick out the "good" tape from the lousy so I don't know what I'm getting until I get home and use the stuff. I guess I need to pay more attention to brand names/types.
Also, on things like the recoil lug, I put the tape on before
release agent. The release agent keeps the tape from sticking very well.
Here's a pic of my latest bedding project:
On the top, compared with the factory stock. That's my 300 RUM A-Bolt. I was tired of stock crushing and the front action screw coming loose all the time on my old stock and don't want to deal with it on the new one....
BTW, I put one single layer of that .005" tape on the very front of the recoil lug. That's it, the rest of the lug is tight.
I used Brownells Steelbed and I'm pretty happy with it so far.