Good barrel for slinging Wolf steel case?

[Grendelshooter]

I’ve got a Grendel rifle with a crap barrel.
Won’t shoot anything we’ll, and with Wolf steel case the best it gets is 4”-6” at 100 yards.
By contrast my AR Performance barrels usually shoot it to about 2MOA.
I would just get another ARP but he doesn’t make them anymore.

So what’s a good alternative to the group buy barrels for shooting Wolf steel?
Nothing precision of course but 2-3MOA would be fine.