I can attest to the accuracy of the takedown.
> With a receiver mounted optic, the 'return to zero' is very good. You will notice a slight variance in POI / group position after disassembly / reassembly - But I am talking a 1" max variance at 100 yards if you do your part with suitable ammo that the rifle likes.
> With a forward mounted optic on the browning scout rail, you will have no variance after assembly and disassembly as the optic is fixed to the barrel as one piece hence the takedown is irrelevant.
See picture below from my 3 shot group from my .358 takedown with a forward mounted leupold vx-r 1.5-5x scout scope
IMHO, any accuracy 'issues' with the takedown (or regular BLR) are more a result of the firmer trigger pull (and long hammer drop). The rifle isn't as 'super-easy' to shoot super accurately right away, but a few range sessions and thoughtful practice and they are very accurate shooter.
FYI, here is a good thorough video review of the non-takedown BLR:
https://youtu.be/1SyZFhv9FUw