You remove some of the wood around the receiver and replace it with a fiberglass/epoxy mixture which dries and conforms to the shape of the receiver. What you end up with is a more rigid stock that fits tightly around the receiver and minimizes changes in contact due to humidity and tem changes.

I bought an acraglass kit to fix a crack in an old stock, but now I' m considering bedding my .308.

All the advantages you mention for glass are correct. However, I don' t believe the Ruger 77' s have a barrel bolt. I had an M70 Win. Super Grade .375 H&H that I glass bedded. (STUPID!!) I just removed that barrel screw and put it away in case I ever traded the gun---it was a tack driver!!

thank you guys for all your addvice i will play around with a little more , i still might do it , it shoots 1-1 1/2 at 100 yards with the right load now and it is not bedded so i don' t know what i will do but thanx for all the good info.

[Deleted by Admins]