First, thanks to all of you, I really appreciate all this help. I do my best to give you all details and give answer to all your questions.
So about the shooter: me. With COVID not easy to find an other shooter so this hasn't been tried yet. I do reload for 30+ years. I shoot competition for 30+ years. I can shoot all day sub half MOA with my Fierce in 7RM (no brake) and a semi-custom Sako in 7SAUM. Not able to shoot consistant under 1/4 MOA but easily under 1 MOA!
The rifle was born R700 BDL, see pics. Shot the barrel out and was a 1 moa rifle.
As said in post#11 compound used for beding is 3M Devcon Alu10610. I put some on the action and some in the stock, put pins in the action screw, put action in the stock and secure it in place with tape over night. Originally beded only the action, yesterday also put Devcon under the first inch of barrel.
Shooting regiment, 1 shot every 3-4 minutes and always shoot test when it is 32 to 42 outside so barrel stay almost cold. Never wait 30min between groups.
The factory bullets are 150 Ball Tip so boattail. Non boattail I only tried Hdy 150 SP with same kind of results.
Before to shoot the factory ammo, I was questioning the rifle. Now more the reloads but two 3 shoots groups under 3/4moa is not huge to confirm if the rifle is all good. I think the next step is to shoot all the 14 factory ammo left to see if I get consistent grouping with it. If so, I will have to focus on my reloads.
Why not Mustang72, next I could try few rounds with a crimp and pressure point. And lastly do like Kmccord suggest.