Had the A/T out what an absolute tw@t to get out. I had a brain wave in the end I put a small piece of pipe down the hole in the top of the action then drilled down the centre so I didn't scratch the surface up it worked a treat she's at 11.5 bang on now I'm happy with that. Tried a few mags through it today aadf good jsb not as good as aadf Hades shite. Accupel clover leaf at 30 yard