Hi all I am new to this forum so thanks for letting me join.
I have a MK2 FX impact .177 and have been having some accuracy issues (inch groups at 30 yards), and on inspecting the liner I have seen what look like tooling marks near the breach end, so I got a replacement STX liner and the replacement looks almost the same, the indentations are just a bit further up the liner. The rifling finishes about 30mm from the breach on one and 40mm on the other. I have looked at a Crown STX liner in .177 and this one has no marks and the rifling goes all the way to the end of the liner, I have put a email in to FX last Tuesday but have had no reply so posting here to see if any one has seen this before or could shed some light on what's going on with FX liners, is it a bad batch ? or have I just been unlucky and got 2 bad ones or are all like it and its not a problem. pics of the 2 liners.