When a reliable scope loses zero

[antlerz]

Watch out for supressors loosening on the thread, That will move zero in an otherwise solid system

 

[mtnbound]

Reloads from a reloading friend (same batch of 100 rounds)
No contact

Even though it would require a big change in velocity, I would also mention this to your reloading friend and confirm the ammo's velocity. Its a part of the equation.

 

[ckaz34]

Bed it.




55lbs on base screws is good, 32in-lbs on the ring screws.




Go to 60-65in-lbs.





Do that.

I picked up a Rostock lite. Do I need to bed this?

 

[Formidilosus]

I picked up a Rostock lite. Do I need to bed this?

If you want the best chance of zero retention- yes.

 

[solarshooter]

Can you drop it and see if it shifts again?

 

[Okie_Poke]

Bed it.

If you want the best chance of zero retention- yes.

Do you recommend bedding the whole action or just recoil lug and front action screw area or …? Thanks.

 

[JohnJohnson]

I’d agree with this.

Turnaround will likely be ~2 months or more. Just so OP knows.

 

[Laelkhunter]

Was it in a soft case or a hard sided case? Maybe while riding in your truck, something was banging on it that you are unaware of. Shoot it again. If it groups but is still off, adjust scope. Shoot it again a day or two (or week) and confirm zero. I would try that before taking it all apart or sending it back.

I know NF are known to be extremely reliable, but I think the SHV is their entry grade scope, not the best of the best. It still should hold zero however.

 

[Formidilosus]

Do you recommend bedding the whole action or just recoil lug and front action screw area or …? Thanks.

Whole action is best, but lug and tang is usually sufficient.

 

[The Harbor Master]

Watch out for supressors loosening on the thread, That will move zero in an otherwise solid system

This was my first thought. I had a .223 shift 2.5mil left, realized my ASR mount threads were damaged and suppressor was not mounting properly. Bullet probably lightly contacting a baffle somewhere upon exit... all good now. Good luck OP

 

[nm.otter]

Whole action is best, but lug and tang is usually sufficient.

Once this is done, what kind of results are you seeing when swapping actions? Unit-to-unit consistency in Tikka actions is impressive.

 

[Formidilosus]

Once this is done, what kind of results are you seeing when swapping actions? Unit-to-unit consistency in Tikka actions is impressive.

Haven’t had an issue.

 

[Castle Rock]

Once this is done, what kind of results are you seeing when swapping actions? Unit-to-unit consistency in Tikka actions is impressive.

I have a few Tikkas including some quite high end target rifles and have never noticed any shift when swapping between stocks and chassis that are properly bedded.
I’m mostly target shooting these days and would certainly notice if there was an issue.