The very best way to bed a Tikka with a factory lug, is to use a 3 step process.
1) Glue in pillars-only
2) With lug in the stock, and area around the lug and rear tang inletted, bed the lug and rear tang
3) Finish bedding the barreled action, leaving the squeezout puddle under the shank.
I've done a dozen, but no one seems to want to put this much effort into it. This is how you get a perfect bedding job using a factory Tikka lug. If you like the way it turns out, you can leave the puddle under the shank. If not, you can easily remove it. I feel it can't hurt anything to stiffen up that part of the factory stock.
1) Glue in pillars-only
2) With lug in the stock, and area around the lug and rear tang inletted, bed the lug and rear tang
3) Finish bedding the barreled action, leaving the squeezout puddle under the shank.
I've done a dozen, but no one seems to want to put this much effort into it. This is how you get a perfect bedding job using a factory Tikka lug. If you like the way it turns out, you can leave the puddle under the shank. If not, you can easily remove it. I feel it can't hurt anything to stiffen up that part of the factory stock.