Hello Tony, just a thought as I've just been reading JT articles on barrel harmonics. Could it be that the silencer is buggering up the natural barrel vibrations. My Webley Vulcan was greatly effected bu a lump of lead flashing wrapped around the barrel in various places. It was always useless with H&N preferring AA fields but after reading JT's article I decided to try putting weight on it and it transformed the groups with H&N. just a thought.

Are you going to keep the tip of the day going throughout the Christmas period? I'm sure it would be greatly appreciated by the membership.
ATB. Hal.