Long range .303

[Beerhunter]

Is there any commercial ammo with a flat base that anyone knows is available in the UK?

Not that I know of. In fact its quite difficult to get FB bullets for reloading, at a reasonable cost. Identical copies of the Mk.VII bullet are available in the UK but at a price!

I found a 174Gn. FB South African manufactured bullet a few years ago that performed particularly well but they are extremely difficult to source in the UK.