Crosman Mag-Fire Ultra .22 - Alternate Special scope sight in issues

[roadrunner255]

Hello all,
Just purchased a Crosman Mag-Fire Ultra .22 - Alternate Special With scope and having issues sighting in the scope.

I thought I had it dialed in at 15 yards, then it jumped up 6".

Scope is a 3940a0 WITH ADJUSTABLE OBJECTIVE , 3x9x40mm provided by Crosman.
I have watched a bunch of videos on sight 0ing.

Any suggestions appreciated.

Thanks

 

[Hateful McNasty]

First off package scopes can be iffy.

Check all your screws stock and mount . Sometimes remove the scope base from the gun snd clean the dovetail dry of oils helps . Properly toque Mount and rings ( pretty standard is 15 " inch" pounds rings 25-30 base). Regardless dont tighten the ring caps past 18inlb it could crush the tube)

Next if still moving or knocks off zero use the irons/ open sights to test to kinda see if that holds true . If so maybe the package scope is rattled in side.

Package scopes tend to fail easy under strong springers. I got a few on the junk pile and of them only one that holdd zero but can't focus well anymore.