I think it'll take a 1.25. The problem from what I've heard is that the balance goes too far forward.
Copied from Bravo page.
Barrel contours accepted: 1.25" for 4" in front of action face, then 1.20" straight to end of forend. A 1.25" straight cylinder barrel will fit but we feel that the clearance is too minimal. We recommend using no larger than a varmint contour to keep proper balance.