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Cheers was going to try it today buit though fine it is blowing a gale so would be hard to tell if the thing was moving or if it was my shooting, will wait for a calmer morning.

Excellent
set it up today then looked and thought
F.......
I'll give it a go as it is.
Thanks.

Between the scope and a rail .
Will a barrel expand more than say 0.06 of a mil if it gets hot therefore pushing the end of a rail or mount up onto the bottom of the bell of a scope , therefore...