Did you add pillars? A buddy of mine bought a couple when EuroOptic had them on sale. I was going to add pillars and bed them for him.
Ha! That's where I got my GRS stocks as well! Holy shit, HALF price, I couldn't pass it up.
I think the laminate is plenty strong and stiff enough but I did cast pillars just because I could and because I bought 2 pounds of MarineTex from Amazon

. I drilled out the holes to about 27/64th, used 6mm inletting screws in the action and drilled out the cast holes to 6.5 mm when done. I could write a lot of paragraphs about whether or not I think the pillars are even adding any benefit but I think most have already been written by people who know more about it than I do.
I found some good pictures here although I did not follow his process:
http://ruistola.blogspot.com/2012/05/as-interesting-case-study-on-bedding-i.html
I did NOT want the receiver pressing on the TOP recoil lug, as he has done. I don't think the Tikka is designed for that, I think this person is mistakenly applying Remington 700 (or any tombstone recoil lug design) thinking to the Tikka. I wanted the pressure around the action screws where it should be. I placed the recoil lug all the way down and put bedding goop all around it. There's probably 0.5mm clearance between the top of the recoil lug and the receiver. When I removed the action there was a pretty darn thin flap of epoxy on top of the lug that wasn't going to be holding anything anyway.
The pictures of where he milled out the stock were very helpful for me. That, I followed, being careful not to mill away a reference point at the rear tang and barrel area. I milled out the underside a little bit as well around the screw holes. Again, a Tikka thing, since the plastic trigger guard has those circular pads that transmit the pressure to the stock. I wanted to have them pressing on an epoxy pad of at least a few millimeters of thickness.
All three guns are 1/3 to 3/4 MOA shooters with factory ammo so I must have done something right

Each of them is 1/3 MOA with its favorite factory load. Considering I am hunting under 200 yards I think it's beyond adequate.
I'm happy to answer any other questions. I enjoyed bedding these things a little too much! I'm also happy for Chad@LRI to tell me I'm full of shit on any of my thinking.
-Stooxie