Does this sound like a scope issue?

[dunraven]

maybe i'm gunshy, and I'm not trying to badmouth anyone's products in public, since my gen II razor can't seem to hold a consistent zero(3 times now, twice horizontal, once vertical). I was rechecking ogive lengths on my competition rifles this week, and noticed that the POI thru a viper pst was at least a minute high at 100. I rezeroed, and began shooting groups with varying ogive lengths. I noticed that the group at '5 off ' was zeroed in both the horizontal and vertical. But as i progressed from 5 to 10, 15, 20, and '25 off ', the groups were moving progressively out to the right, each one a bit farther, to at least an inch off. Could this be a scope issue or should i look elsewhere? (Also, the rifle seems to be shooting right at 450 when there is virtually no cross wind component.) Anyone else seeing this in vortex or have an idea as to what is happening? Thx.

























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[CharlieNC]

From what your are saying it sounds like these are moving off as groups (not individual shots at random), by the different seating depths. Perhaps that is the cause.

 

[jds holler]

One of the great heartbreakers of rifle shooting in my opinion, is that ANY sort of change with a load will often cause a windage change; and sometimes a substantial one. I suspect barrel harmonics, but I'm open for other ideas. jd

 

[Rob01]

Been running Vortex optics for years from a PST to Razor IIs and never had any zero shift issues. Sounds like as mentioned it was the load work.

 

[dkhunt14]

Been running Vortex optics for years from a PST to Razor IIs and never had any zero shift issues. Sounds like as mentioned it was the load work.

This is not the case with other shooters. I don't think the scope is the problem. I think change of loads is causing the point of impact change. It also could be bedding or barrel heat. As far as the 450 yard being off, it is usually caused by the scope not being level on the gun. If this is the case the farther out you go, the more it will be off. Matt

 

[Rob01]

What is not the case?

 

[Delfuego]

What kind of rings? Base? Torque? Loctite?

You can always send it in to Vortex, they are awesome people and you will like get it back in a week.

 

[Mr.Knowit all]

I had two pst 6-24x and I had problems with both. One even had a hair in the middle of the reticle-should have caught that in the final inspect IMO. One would not hold zero also. I would dial up for an 800 plus shot and would not re-zero. About 5 min. high at 100 yds. Vortex took care of it-even replaced one of the scopes. A LOT of guys like them but I do not. I heard good things about the pst gen. 2 that just came out. Not sure if that is the one you are having problems with or not. I have two NXS now and no issues.

 

[Ggmac]

Scope bases not in line with the bore . What kind of receiver ?

 

[BoydAllen]

Next time, shoot your final group with the same load as your first group and see if the group returns to the same spot. That should answer your question. Also, you could shoot a series of groups with the same seating depth and see if they stay in the same position.

 

[XTR]

I know it has been written over and over again, but it's worth reminding you to check the torque on the base screws, the rings, and the action screws.

I used to be a little OCD about that stuff, after some rather painful experiences I am on another level when it comes to that now. It does result in moving POIs.