Before you jump to the conclusion that it's the stock's fault, how many types of ammo have you tried?

I have owned three Savage Trophy Hunter's with the "cheap" plastic stock, and all three have been able to shoot sub-MOA consistently, once I found the right factory ammo or handload for them, and once I relieved the contact points between the stock tip and the barrel (two of the three were touching slightly and needed to be opened up).

The stock may be your problem, but I'd look at the ammo question first.

BTW, even the cheap plastic TH stocks are already pillar bedded.