+1 on the HS Precision bedding block. If you have a standard action/barrel
this will be your best bet.
I used glass bedding on a ruger 77v in a McMillan stock. There was not a
bedding block molded into it, nor did I want to do pillar bedding since it was
cut to fit the action as is. However, there was still a little bit of a gap
--especially around the rear tang. This would have caused major play
due to recoil and affected accuracy. I glass bedded it and consistently
did sub-moa with handloads including hole in hole. BTW, I like the solid
feel of the McMillan over the HS.
If glass bedding is done right, it is nearly as strong as steel. You can do
this job yourself, but I would suggest practicing on scrap wood/metal before
you try it on your firearm. Think of this more like painting a portrait rather
than caulking a bathroom when it comes to application. A little goes a long
way. Be sure to use the release agent and don't get any of the bedding
compound in the trigger mechanism, safety, mag well, etc. It literally just
provides a "bed" for the *receiver* (up to the sides where it becomes
exposed outside the stock). I've seen some people recommend doing the
first couple inches under the barrel as well, but it seems to me that would
mess up the barrel harmonics. I did not do that on the 77V and the results
speak highly of leaving the barrel like a tuning fork.