Finally making some headway over here.
Barrel finally came in.
Roughly 6 month wait. Unexpected.
The pbb hybrid lite profile ends up being decently thicker then the factory lite. I was under the impression they would be about the same.
Resultant weight on my 23.25" pbb helical fluted barrel was 0.1 oz heavier then the factory 24.3" 300 mag barrel. I was hoping to shave half a pound with the fluting.
Looks pretty snazzy though. (Debating a metallic copper rattle can job

)
As pictured im at 9# 6 oz w/o the mag and pod. Nx8. Peak 44 bastion. TBAC 9.
The tikka factory mag seems to work great. The waters is going to need some more tweaking. Need to break the files out.
First load is 135 gr bergers. Adg brass sized in a SAC die. Cci 200. 57, 57.5, 58 gr of n565. I think im about 2.93" COAL. Wish I would've seen if they had a longer reamer. Ive got all the length in the world with the tikka action.