MOA in standard hunting rifles can be achieved in many rifles. It does take some time and effort.
1. Marry the ammo to the gun.
Not all ammo performs well in every rifle. It is a matter of trial and error. Using different mfg'd ammo, recording the MOA and finding which one fires better in your gun. This will include bullet weight also.
2. Glass bedding:
Bedding the recoil lug will improve the MOA noticabley.
3. Reliving the barrel channel where ever it touches the barrel. "They" say if you can slide a dollar bill, between the barrel & forearm, you have a floating barrel. On a hunting rifle this will work.