The viper pst 2 failures

Joined
Oct 16, 2025
Messages
7
I would like to hear from anyone who has had this scope and experienced a failure in it. Im currently shooting a rifle with this scope and i cant figure out my problem. If you’ve had one of these, please tell me what you experienced in the failure.
 
I have had one on my 20 ga shotgun for about 150 shoulder stinging slugs. No failure yet. But I have had scopes that needed occasional readjustments that can only be explained by the scope zero wandering. I have also dealt with scopes that just didn't work well. It would be easier to help if you explain your failure as there are other links in the chain that could cause innacuracy. As in loose bolts/screws, cracked/uneven rings, or even shooting a load that will never be accurate. Always start with checking your entire mounting system. Then try another load in the rifle if you haven't. Depending on twist rates you may need to try different bullet weights. If no improvement you need to try a scope that has been proven. You can even borrow a friends scope if needed. If everything checks out with those steps and you verify that that pst is a pos send it back to Vortex.
 
I would like to hear from anyone who has had this scope and experienced a failure in it. Im currently shooting a rifle with this scope and i cant figure out my problem. If you’ve had one of these, please tell me what you experienced in the failure.
What exactly is the problem you're experiencing?
 
What exactly is the problem you're experiencing?
I wish i had a better answer for that. Long story short, ammo has not changed. Rifle did not change, just the scope. Sight in went very well, and i was confident. First hunt, missed twice @250yds(chip shot). Back to the range after, cant hit paper. No drops, knocks or anything to bump it. It was mounted the way it should have been. I sent it to vortex, and they claim nothing wrong with it. The rifle shot groups with same ammo and different scope afterwards.
 
Did you remount and try again? What kind of rifle? I just went through this with a friend. He has a Remington 700 ADL in .223 that's a extremely accurate. Put a new scope on it and groups opened up. He took it all apart and reassembled, re-torqued, voila, it's grouping again. The internal mag box wasn't in the action correctly and causing pressure.
 
I fell hard and my Tikka CTR rifle went tumbling end over end down a very steep hillside. Probably at around 50yds it finally came to rest. The muzzle brake was packed full of dirt as was various other areas throughout the rifle. I thought it was destroyed for sure. After getting back down to the bottom I got it halfway cleaned up enough to put a few rounds through it at 100yds. To my surprise it held zero perfectly, no changes at all. This was years ago and still haven't had any issues with that scope and rifle. With all the bad talk out there about the vortex scopes, I suppose I got a "good" one. 🤷🏻‍♂️
 
I've had a few of the PST 2's over the years (still have two of them). Can't help with failures since I haven't experienced it. The one on my 22-250AI rides around in a side by side quite a bit. Another lived on my 338 RUM and it's still kicking.
 
I wish i had a better answer for that. Long story short, ammo has not changed. Rifle did not change, just the scope. Sight in went very well, and i was confident. First hunt, missed twice @250yds(chip shot). Back to the range after, cant hit paper. No drops, knocks or anything to bump it. It was mounted the way it should have been. I sent it to vortex, and they claim nothing wrong with it. The rifle shot groups with same ammo and different scope afterwards.

Did you check everything when you dismounted it? Before sending it in?

If you were totally off paper something happened mechanically. I would suspect loose screws somewhere myself. Action screws, barrel interference, mounting screws. Mounting systems can look fine...but aren't. Adding paint pen witness marks and sealing the top of the screw can show movement. Whether it cracks the paint or is visibly moved. I actually do the same for my action screws now.

I'm not a vortex lover...I do have a couple though. I don't think it was your scope in this case though.

YMMV...
 
My hunting partner had a Viper PST on his old 300 RUM, not sure exactly what went wrong internally but the scope no longer did scope things. Gun became so inconsistent it was driving him insane, despite my insisting he swap the scope and see if that fixed it. He was convinced it was the rifle....wrong.

He has now seen the light and has a Trijicon Tenmile that is dead nuts on, 100% of the time
 
Ive had a PST GEN 2 5-25 on a .22lr for 8 years or so that I use for rimfire PRS-type shooting. It tracks and works in use, but it frequently needs to be rezeroed. However, the road to get here involved multiple mounts and sets of rings, as well as stock bedding, pillars, etc. I have had the base come loose from the action. Ive had the action shift in the stock. Ive had ring clamps loosen, rings loosen on the scope, ammo issues, etc. Every time I addressed one of these the rifle got more consistent. At this point I zero the rifle but I set the zero-stop 5 clicks past that to give me room to simply reslip the turret at the beginning of a range trip because resetting the zero stop is a hassle. For me, at this point, what happens is I will get to a range and put a sheet of target dots at 50 yards where I zero. My rifle and ammo keeps 10 rounds inside a 3/4” target dot consistently. Often I’ll need to adjust a click or two, maybe 3—for me its often windage, elevation is less of an issue. Several guys Ive shot with have the same wcope and wveryone pretty much rezeros most range trips, but just a couple clicks—enough to matter in a match or on paper, but probably still minute-of-deer at 200 yards. Once re-zeroed it’ll hold zero for the day. The only time Ive had an “off the paper” experience was a loose base or ring clamp. I dont know why but Ive had more issues with loose bases and rings on my 22lr than I have an any centerfire gun.
 
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