Champion? I know nothing about that barrel... ER Shaw's I have some input.. not as good as GM's IMO and I have owned 3.. 1 however I sent to Que when he was re-chambering and it does shoot MOAish with decent ammo... ALL my herd of KID/KIDD barrels shoot sub-MOA and with a variety of ammo and always very consistent.... no need for high end ammo with KID barrels unless you intend to compete. Pay more worry less... I have never regretted paying for anything with a KID/KIDD label.Doesn't appear those shooters ridge barrels are for sale anymore.
I'm debating between Champion, ER Shaw, and a Kidd ultra-light. Would love to have something that shoots consistently in the ballpark of .5".