Help w Strelok Ballistics App with +20 MOA Rail

[Larryh128]

I've been using the free Strelok Ballistics program for several years and it has been extremely accurate. BUT now my rifle has a 20 MOA rail on it and there is no provision to add that in so it's not accurate at distance. Does anyone know if the Strelok Pro version has the ability to input a 20 -40 MOA rail?

 

[Dusty Stevens]

I've been using the free Strelok Ballistics program for several years and it has been extremely accurate. BUT now my rifle has a 20 MOA rail on it and there is no provision to add that in so it's not accurate at distance. Does anyone know if the Strelok Pro version has the ability to input a 20 -40 MOA rail?

Why would it matter if its a fixed rail?

 

[rijndael]

You just rezero the rifle and keep using strelok as you were before.

 

[Larryh128]

Why would it matter if its a fixed rail?

It doesn't track the same a a 0 rail. Drops are way off.

 

[Dusty Stevens]

It doesn't track the same a a 0 rail. Drops are way off.

It doesnt move. Pretend its a zero rail

 

[Dusty Stevens]

If you had a 400moa rail and was able to zero your scope at 100yds at that point the rail is a zero moa and put 100 as your zero distance

 

[6.5 forever]

You do not need to worry about the rail.

 

[xswanted]

I've been using the free Strelok Ballistics program for several years and it has been extremely accurate. BUT now my rifle has a 20 MOA rail on it and there is no provision to add that in so it's not accurate at distance. Does anyone know if the Strelok Pro version has the ability to input a 20 -40 MOA rail?

What is not working in your setup?

Can you be more specific?

The rail should not effect drop, just zero. So if your chart is off, something else has moved.

 

[karrarararararar]

Having a 20 moa rail is no different than having your zero adjusted 20 moa. It doesn't affect the function of the app.

 

[RegionRat]

Suppose you had a set-up with a plain rail. You had a scope height and a zero distance, you entered your bullet data, velocity, and you were happy with the DOPE you got from the program.

Next, if all you did was pitch the scope tube 20 MOA, you really haven't changed the DOPE. You enter a scope height, and re-zero the scope at the same distance you used before, and all you have done is shifted the outer and inner scope tube by 20 MOA.

The only thing a 20 MOA rail does, is to give you a 20 MOA shift in the scope internals to allow for using 20 MOA more drop since the scope tubes start toward what used to be unused space.

Did you make any other major changes. or just the rail?

 

[lal357]

shot in the dark but could it be center of scope to center of bore changed because of the moa

 

[Dave M.]

shot in the dark but could it be center of scope to center of bore changed because of the moa

That is a real shot in the dark…unlikely. Something else is wrong with the OP’s setup or he/she is just thinking there is an issue where there really is not one.
Dave

 

[Larryh128]

Ok, I'm 0/0 at 100, take it to 300 and close but not perfect, go to 500 and I'm off by about 2 mils in drop. Velo is good, height to center of scope to center of bore is good, G7 is good. With a 20 moa rail I'm changing the angle of the bore in relationship to the scope center. There has to be some compensation.

 

[Larryh128]

shot in the dark but could it be center of scope to center of bore changed because of the moa

What I'm thinking.

 

[rijndael]

Ok, I'm 0/0 at 100, take it to 300 and close but not perfect, go to 500 and I'm off by about 2 mils in drop. Velo is good, height to center of scope to center of bore is good, G7 is good. With a 20 moa rail I'm changing the angle of the bore in relationship to the scope center. There has to be some compensation.

Your rail has nothing to do with why your drop charts are wrong. As long as it's been re-zero'd, it's out of the equation. You have something else askew.

 

[wb30378]

Ok, I'm 0/0 at 100, take it to 300 and close but not perfect, go to 500 and I'm off by about 2 mils in drop.

Are you sure you’re off 2 mils at 500? Most rifles I have only need 2.5 mils or less at 500.

 

[fkimble@charter.net]

The plane of the crosshairs inside the scope has changed it's angle relative to the bore. I could see a very small change due to crosshairs moving less per click than before. With scope parrall to bore, the vertical movement of scope crosshairs is full value ref vertical. Once the scope angle tips downward, the crosshair movement is the same amount but now not pefectly vertical, hence a small change(reduction) to the actual vertical.

Frank

 

[Lone Hunter]

Where does it ask on Strelok about your rail? I looked at StrelokPro and it asked what you are zero’d at. You said 100 yards. If doesn’t ask because like everyone has said the 0,10,20,30 moa rail doesn’t matter. It goes from your zero at 100 yds. You need to re-examine your inputs. Something in your inputs is not correct. I use a 0 rail on some rifles and 20 moa on some others. As long as my info in is correct my outputs are corrector very close. Bottom line, I think you need to look again at all your inputs. I use Shooter also and StrelokPro and if I don’t have the same inputs there will be different Firing solutions. It’s aggravating but check your inputs and you’ll find the problem.

 

[Knotwild]

I suggest upgrading to Strelok Pro - It has a lot more data to resource. It's been so long ago since I used the regular Strelok that I don't know if it allows for "truthing" your results with the app. But, I know that Streok pro does offer this feature. So you would input the changes in reality vs. app calculations and voila - your Strelok is on again. Strelok can do so much that it is worth watching some of the videos on how to utilize it's features. There's a lot more there than you see on the surface.

I don't say this offensively, but is it a quality rail and scope? It it is Chinese for instance I would initially be thinking it's a quality issue. Rail or scope.

Does your scope track accurately in a ladder test for instance. If it wasn't tracking "on the money" to begin with, the slope of the rail could be amplifying scope error.

 

[rsbhunter]

Drop is a result of gravity, not optics. The theory used to be the closer the centerline of the scope to the centerline of the bore, the easier it would be to hit at distance......There is a video out there where a guy uses a scope mount that is like 18" (!) high. As long as the center to center is entered into the ballistic calculation, the bullet hits where he aims.....As long as the adjustments of the scope, either MOA or Mil's match the data entered into Strelok, the data, if accurate as to fps, g7 , weather is close, angle etc, the math will be correct. I've had times where I thought the problem was my Strelok, when I found out the problem, it was my data that was wrong......As frustrating as it is, go over everything again for data entered.... Keep us posted as to what you find out....rsbhunter