Not betting large sums of money yet but I'm pretty sure my barrel is moving. With or without shroud, with or without reflex moderator the guns zero moves around mostly in a circle NOT just up and down or left right but in a circle. If I even slightly flex the barrel a little, such as might happen if you leaned barrel against a wall, the zero changes. Screws are pretty tight (getting at the bottom one is bother). I never got the reasoning behind the one screw on bottom, two on top method of affixing a barrel but here we are. By design I don't think the barrel hole in receiver is exactly round so angle can be adjusted. What else can I do? If there are any tuners out there what is you secret fix? I was thinking about shimming around the barrel. the three grub screw configuration does little to limit lateral movement. I know the 3 screw is to allow angling the barrel up and down to counter droop or other irregularities to bring barrel inline with the scope.
I could be wrongly diagnosing my problem but the zero moves around even if velocity is steady and hold consistent. Sometimes deliberately flexing the barrel a few times will bring it back to "original" zero. The zero range of movement is about 1 to 1.5 inches (50 yds) usually but can be much worse especially if the rifle sees a lot of handling. The barrel is free float without any type of barrel band and the shroud does not touch or bind against the receiver (it only touches barrel). The shift is usually linear instead of looking like flyers here and there as the gun settles in for 3 to 8 shots sometimes. Again, velocity doesn't seem to be an issue as this happens with ES of less than 6 fps or so. Tested with 3 scopes. Gun is at least 7 years old and the problem was the same on original electronic board as it is now on the Heliboard I have in it now.
The reflex moderator shifts everything about 4-5" out to 4 o'clock and while i know moderators can shift zero this seems a little much (this is a separate issue).
I could be wrongly diagnosing my problem but the zero moves around even if velocity is steady and hold consistent. Sometimes deliberately flexing the barrel a few times will bring it back to "original" zero. The zero range of movement is about 1 to 1.5 inches (50 yds) usually but can be much worse especially if the rifle sees a lot of handling. The barrel is free float without any type of barrel band and the shroud does not touch or bind against the receiver (it only touches barrel). The shift is usually linear instead of looking like flyers here and there as the gun settles in for 3 to 8 shots sometimes. Again, velocity doesn't seem to be an issue as this happens with ES of less than 6 fps or so. Tested with 3 scopes. Gun is at least 7 years old and the problem was the same on original electronic board as it is now on the Heliboard I have in it now.
The reflex moderator shifts everything about 4-5" out to 4 o'clock and while i know moderators can shift zero this seems a little much (this is a separate issue).
I'm afraid I will be tempted to get all tooled up with nowhere to go....I've done it before (rebuild cameras and lenses, some watches, fountain pens, scuba gear, on and on)