Bullet keyhole / tumbling problem...BHW barrel???

[txgunner00]

I think this is the first time I've heard of a new barrel grouping like that and key-holing on this forum. That barrel is whacked. Maybe it's a .277" bore? I ...st.

That was my initial thought. A new barrel of the proper bore shouldn't be keyholeing unless there are obvious flaws in the machining.