FX Impact .30Cal and Poi issues

Is anybody shooting a ,30 and having POI issues ?? looks like the liner is turning or something.... stripped it down cleaned it all and re-assembled..

problem is its shooting great for the day you zero and then it alters POI 1" right and low..

When i stripped the barrel liner, i found moisture between the liner and barrel...

seems the way FX secure the liners is just not working ?

So im seeing if anybody else has had the problem and "how" they fixed it..

its currently set to 90ftps and shooting very good groups