I agree with Gunnut on the Brownells Accragel For your first attempt. It is much easier to work with. I have found the Brownells areosol release agent to be the absolute best because it doesn't need to be dried before use, it is however more expensive than any other method. What ever you use make sure you don't miss any part that might be exposed to the glass.
90% of the job is preparation the clay and masking tape are your friends. Most bedding jobs only do the frt. and rear receiver rings with the rest of the rifle left free floated(bolt actions). Some add bedding 1 to 2 inches under the back of the barrel (usually heavy tgt or varmint bbls). Again assuming we're talking about a bolt action the recoil lug should only touch the glass bedding on the rear face of the lug. To achieve this mask the lug on the sides, bottom, and front of the lug with several layers of tape. After the bedding sets up and you remove the tape you have clearance where the tape was. I recommend you make or buy guide screws and don't use the action screws when glassing the action. Rem & Savage use 1/4 X 28 NF, Win. uses a std SAE thread size. Guide screws are available from Brownells or Midway cheap. A 4" bolt of the proper size with the head cut off is a guide screw. When reassembling the rifle with the reg. screws relieve the screw hole through the glass so the screws don't touch on the sides either like the recoil lug.
Remember when you relieve the stock you need to allow for the masking tape so you don't knock it loose when you try to set it into the glass.
Do make sure you have dotted all the "I's" and crossed allthe "t's" before you mix any glass.
If the rifle is a Ruger 77 take it to a pro. The angled frt screw and ridiculously short recoil lug make them difficult, in fact I charge 150% to do them, they can be a real PITA.
Hope this helps.
