Rifle Scopes Vortex Viper PST CRS Zero Stop - How Many Shims?

[jimster716]

Sighted in my 6-24x50 PST SFP on my R700 AAC-SD (with regular scope mount not the 20moa kind). Once sighted-in, I decided to set the zero stop using the provided shims. Unlike what I saw in the video and manual, I had to use all of the provided shims (like 20 of them equaling like 3/16") to set elevation zero with none to spare. I now have only 5.7mils of upward elevation from the original 19mils of total elevation before I set zero. If it works, it works but anyone else use up all of their shims to set the zero stop?

 

[Early Cuyler]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Negative, ghostrider. What range are you setting your zero at? I had trouble taking my R700 to 500yds with a 100yd zero and my NF BR 8-32x56. I switched to a NF 25MOA base and now it's all gravy. If you get the same base, that'll give you roughly 7 mils additional elevation. NF even has a 40MOA base option for R700.

 

[oneshot.onehit]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Are you putting in the shims once your zeroed on 100 yards?

 

[jimster716]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Sorry, should've mentioned that critical piece of info. I zeroed at 100yds. Not a big deal but I'll probably look into a 20 or 25 moa base and reset my zero stop. Just wondering if anyone else had this experience.

 

[Chambo32]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

I just added the shims in my PST i got Friday. I do have a 20moa base and all said and done have about 45 MOA up. So your 5 mils sound about right with out a canted base. The PST manual does say they recommend a canted base for shooting over 800 yards.

I was a little disappointed as the scope I got must of had the parallax internals reversed as the distances do not match up with where it actually focuses. I got to call Viper and get a new scope on monday.

 

[Sowastrong Industries]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

My 1-4 PST took nearly all the shims before it would stop near zero.

 

[Tomcat088]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chambo3232</div><div class="ubbcode-body">I just added the shims in my PST i got Friday. I do have a 20moa base and all said and done have about 45 MOA up. So your 5 mils sound about right with out a canted base. The PST manual does say they recommend a canted base for shooting over 800 yards.

I was a little disappointed as the scope I got must of had the parallax internals reversed as the distances do not match up with where it actually focuses. I got to call Viper and get a new scope on monday. </div></div>

Just because the parallax numbers don't line up with the distances doesn't mean that your scope is messed up. Depending on your eyes, and using the diopter adjustment, I believe can have an effect on this. Do you even have an accurate range finder to know that the markings aren't correct? It's not like you should be using the numbers on the parallax adjustment to range with. It's meant to get you in the neighborhood, check the focus, and then check the parallax (visually with your eye). It just seems silly to nitpick about something like this, on this price level of scope. If that's what you want, you'll likely be disappointed.

 

[sawman556]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Personally I wouldn't use the shims. They don't seem to stop on zero anyway.

FWIW, I have a brand new Badger 20MOA steel rail in OD that I can't use because I decided to go with a custom barreled-action. It's for a 700 SA. PM me if you're interested.

 

[42769vette]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sawman556</div><div class="ubbcode-body">Personally I wouldn't use the shims. They don't seem to stop on zero anyway.

</div></div>

ya but if you have 4 revolutions of up dialed its alot better than counting your way back down. to me they dont have to stop exactly on zero, im smart enough to dial back up to zero when it stops. if you dont shoot long enought ranges to get past 1 revolution zerostops are kind of pointless

 

[Kells81]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: sawman556</div><div class="ubbcode-body">Personally I wouldn't use the shims. They don't seem to stop on zero anyway.

</div></div>


Would guess you have never had the pleasure of thinking you went 4 turns when in fact you only did 3..... Sure they don't stop on zero but I could train a monkey to use the system since it gets you pretty damn close


OP, get the 20 or 25MOA base. I never had any issues getting to 1200 with a 20MOA base. I have tried more but you run into issues getting the impact low enough without running out of elevation the other way.

 

[angle]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: oneshot.onehit</div><div class="ubbcode-body">Are you putting in the shims once your zeroed on 100 yards? </div></div>sorry,i have no idea .

 

[JD42]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Hi I have one of the Viper HS scopes. And Zeroed it in at 100yards. I used most of the shims for the zero stop. The Zero stop will not stop at zero. But very close. Like 4 clicks more. I am useing a 20moa base. I think its a great feature. I have yet to shoot my rifle at longer ranges. If weather allows I am going to try 300yards this week and see how well it works.

 

[fw707]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

You need a canted base.
After zeroing at 100 yards with a 20 MOA base I had a bunch of elevation left on the dial. The shims put me about 5 clicks from Zero on the turret.
It seems like a simple and reliable system to me.

 

[The Punisher]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

I ran out of adjustment with my PST also. I shimed the back of my scope and it gave me a round and half of more adjustment.

Rem 700, 260 rem caliber with a weaver 20moa 1 peice base.

 

[Redleg84]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: msowa</div><div class="ubbcode-body">My 1-4 PST took nearly all the shims before it would stop near zero. </div></div>

I just zero'd mine (1-4 pst) yesterday and used all but 3 shims.

 

[Chambo32]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

Tomcat088,

I was shooting this morning at 650 and it said 60 yrds on the parallax adjustment. I think it is a bit more then my eye as when I shoot close it goes up in yardage. They could have pad printed the knob in the wrong orientation resulting in it being backwards. Or possible the internals are backwards???

Don't get me wrong the scope is great, but kind of sucks to have paid 750 and have something as simple as that get missed in manufacturing.
I can kind of see it happening as quality control in another language can be tough seeing how it is made in the phillipines. You don't send product to be made in the phillipines for better quality

 

[Bedlam]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Chambo3232</div><div class="ubbcode-body">Tomcat088,

I was shooting this morning at 650 and it said 60 yrds on the parallax adjustment. I think it is a bit more then my eye as when I shoot close it goes up in yardage. They could have pad printed the knob in the wrong orientation resulting in it being backwards. Or possible the internals are backwards???

Don't get me wrong the scope is great, but kind of sucks to have paid 750 and have something as simple as that get missed in manufacturing.
I can kind of see it happening as quality control in another language can be tough seeing how it is made in the phillipines. You don't send product to be made in the phillipines for better quality

</div></div>
There's no reason to live with it. Send it in, Vortex has superb customer service.

Also, English is one of the two official languages of the Philippines and it is actually the preferred language used among educated people and technical materials.

 

[Roweswood]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

As many others have said, I agree that you need a 20 moa base.

Vortex has a youtube video on how to set up the zero stops in the PST. They aren't meant to stop directly at zero, but to go a bit past and stop. I think the url for the video is in the manual.

 

[sgtlmj]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

I have never looked at the numbers on a parallax adjustment, whether it was the objective or turret type. Just dial until the target is nice and crisp. Heck, some manufacturers (Leupold) just put dots on the turret knob.

 

[fern]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

I did the same to ss scope, i added shims to where it stops 1/4 moa passed my zero.

 

[Powder_Burns]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

I had 3 shims left over, using a 20 MOA base. The trick to getting the zero stoppish to stop on your 0, is to set your shims like the instructions describe, and when you replace the turret and dial past zero, count the number of clicks you go past zero. i.e. If I set my zero stoppish and I had an extra .5 mils of travel past zero, I'll set the turret to +.5 mils from zero and reshim. This way, the turret WILL stop at zero and not a click past.

 

[Bedlam]

Re: Vortex Viper PST CRS Zero Stop - How Many Shims?

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Powder Burns</div><div class="ubbcode-body">I had 3 shims left over, using a 20 MOA base. The trick to getting the zero stoppish to stop on your 0, is to set your shims like the instructions describe, and when you replace the turret and dial past zero, count the number of clicks you go past zero. i.e. If I set my zero stoppish and I had an extra .5 mils of travel past zero, I'll set the turret to +.5 mils from zero and reshim. This way, the turret WILL stop at zero and not a click past. </div></div>

Assuming I correctly understand your procedure, then your turrets may stop perfectly at zero but your POI will be off by 0.5 mil.

Dialing to the stop then a few clicks back is fine. I'd rather do that than have a POI that is incorrect.

The main (only?) purpose of a zero stop is to enable you to return to zero without bothering to remember or know how many revolutions you've gone and without any possibility of going any revolutions past the zero.