I have several B&C stocks in several models with and without the aluminum bedding block from Alaskan, BDL Sporter/BDL Heavy and Tactical Varmint.
Sounds like I must be the luckiest man who ever spent money on them...all bought used.
Every one has worked out fine and still have them today.
I think they work great for the price I've gotten them for since all the rifles in them shoot great.
With that said, I also have Manners, McMillan, Proof, Mesa Precision and Grayboe.
They have all been great.
I have done minor work on several brands just to get the best fit but never had a twisted barrel channel or receiver bed out of whack... I guess as with all things...they aren't always perfect.