Just out of curiosity, how did you manage to ruin the bolt? - dan
Does a bedding block include pillars? If not, you'd need pillars then, too.
That McMillan stock does not need pillars... not many stocks need pillars... not many stocks will benefit from pillars...
I will bet if you take two McMillan A5 stocks and do a good job of glass bedding a .308 barreled action into one stock and then do a good job of pillar bedding the same barreled action into the second stock you will see no difference in accuracy between those stocks. Just tighten the screws good and snug... you don't need to torque them with a big driver...
Everyone rants about pillar bedding... it is not a cure all. It will be a benefit in some cases but it is more important that it be done right rather than just done with pillars. I have seen home installed pillars and the bedding job was terrible...
If you want pillars have it done professionally.
Do any/all of these bedding blocks have portions that extend all the way through the stock to the bottom metal, just as pillars do?