The foundation of rifle accuracy is the bedding of barreled action into the stock.You may have a rifle with quality, barrel,action and scope,it can shoot well or not so well.pillar bedding will increase it´s accuracy.In both cases,there is a great advantage to glass bedding the barreled action
with,two part epoxy bedding compound.
The most accurate rifles,in bench rest competition,varmint,tactical,
hunting,and target shooting,are pillar bedded.Rifle Bedding Book is all the guide you need.