Does the No.1 Mk 5 have an internal barrel band like the No.1 Mk 3? I'm taking mine to the range this weekend for the second time. Last time out it seemed to string vertically as it heated up and I was wondering where I would adjust / tighten things up in the first instance to see if I could effect the grouping. First check is on my eyes, I'm putting a dab on bright paint on the front sight blade and will shoot at 50 yards with a center hold to make sure it's not me before I change anything.
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