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As a few of you may remeber I gota brand new Wolverine in .177 late last year. Now the accuaracy and grouping on it were sublime with ragged one hole groups at 30yds a given. However on a couple of hunting trips it had me scratching my head as I clean missed a couple of easy shots and in one case could see the pellet through the Night vision fly to the right of the bunny. I took it to the indoor range and tried everything I could think of scope, mounts me the lot and I couldnt reproduce these sudden POI changes with any regularity they just seemed to happen and it was driving me up the wall. Until that is one test where I decided to manipulate the shroud by tapping it with my hand to either the right or left and lo and behold this would shift the POI by about 2" every time still maintaining the tight grouping. So I took it back to my RFD and he tried it and got even worse results i.e. up to 4" shift at longer ranges. Now we both thought loose barrel which is a bit odd as the Wolverine is supposed to be very well fixed into the block. After a call to Daystate they had it back and said they would sort it. Got an respose back today on what was causing it and it was a bit of a suprise. Apparently the buddy bottle was tight up agaist the shroud and the shroud / barrel was sliding about on top of the bottle when the shroud was knocked such as going into the gun bag or when the gun underwent temparature changes (I tend to zero in a heated indoor range so going from warm to cold was shifting the POI. It is probably on a minor movement in the barrel but because it couldnt get back to a natural rest position due to contact with the buddy bottle it was throwing the POI out. Just though it may be of use to someone if they were experiencing such issues I knew that contact of stuff with the barrel can have an effect hence why a lot of people free float theirs but never seen it to this extent.