How do that trajectory validation work?
if it is of by 3 mrad and i type it in it says 0,0000 in BC.
if it is of by 3 mrad and i type it in it says 0,0000 in BC.
Stralok pro (truing)
- Thread starter spyde82
- Start date
Try using 3 instead of negative 3. I’ve found that if the value is way off due to my error the BC normally comes out at 0. Check you’ve got your other setting correct
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On the home page of StrelokPro you first need to enter the distance your shooting. Say 100m. It will then give your elevation. It might be 3.3 mrad.
Then go to the truing function.
There you neen to enter the actual value that hit you point of aim. So maybe you want down .2 mrad. So now you would enter 3.1 and press calculate.
Then go to the truing function.
There you neen to enter the actual value that hit you point of aim. So maybe you want down .2 mrad. So now you would enter 3.1 and press calculate.
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It has calculated a bc is .633 and is asking would you like to replace your old bc of .1 This obviously isn’t correct!
Your zero’d at 50m and shooting at 64m?
That is only 14m past your zero and is really to short a distance to give you a real idea of your bc. .1mrad will change your bc significantly at that distance As an experiment put .7 as you correction and see how that changes your bc.
Can you stretch it out to 100m that will give you a better idea.
Make sure all the other data you have entered into strelok is correct or it will throw everything out of kilter.
Scope height is particularly important.
You also need to be sure of you muzzle velocity.
Also want as calm conditions as possible!
Another tip is make you target just a horizontal line so when you take your shot that is you main focus not left or right as its easier to aim on just 1 plain.
Your zero’d at 50m and shooting at 64m?
That is only 14m past your zero and is really to short a distance to give you a real idea of your bc. .1mrad will change your bc significantly at that distance As an experiment put .7 as you correction and see how that changes your bc.
Can you stretch it out to 100m that will give you a better idea.
Make sure all the other data you have entered into strelok is correct or it will throw everything out of kilter.
Scope height is particularly important.
You also need to be sure of you muzzle velocity.
Also want as calm conditions as possible!
Another tip is make you target just a horizontal line so when you take your shot that is you main focus not left or right as its easier to aim on just 1 plain.
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I am zeroed at 30m, i am just trying to get it to work, i know it is better to go out to 100m
all my other data should be right.
all my other data should be right.
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Even if i type in 100m and 22 clicks it says bc 0,000 so something is not working or wrong data ( just don’t know what that could be) 
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That will help. I think you problem is that at 970fps and have a very flat trajectory so it hard to measure the bullet drop accurately at that distance.
I added to my post above it might help if you just focus on a horizontal line rather that a normal target.
I was just fiddling with strelok and .1mrad changed my bc from .09 to .12 at 100m with a 50m zero.
That’s calculated over a vertical drop of 30cm from my 50m zero.
You’d have nothing like that drop so each click makes so much difference.
I added to my post above it might help if you just focus on a horizontal line rather that a normal target.
I was just fiddling with strelok and .1mrad changed my bc from .09 to .12 at 100m with a 50m zero.
That’s calculated over a vertical drop of 30cm from my 50m zero.
You’d have nothing like that drop so each click makes so much difference.
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Kezselby was right you data is to far off. I entered it and got the same 0
You need to lower your bc and increase your hold over and it will work.
You need to lower your bc and increase your hold over and it will work.
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Bc on the box is only guidelines, real bc changes with speed
That is correct, but it should give you a ballpark figure to reference.
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AirSupply,
You mentioned scope height. Does having your scope on adjustable rings mess with the data. If the rears sights are higher than the front?
You mentioned scope height. Does having your scope on adjustable rings mess with the data. If the rears sights are higher than the front?
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I don’t think the angle of the scope is important. You just want to measure from the centre of the front objective lens to the centre of the barrel. The easiest way is to measure the distance between the lens and the barrel and add half you lens diameter and half you barrel diameter.
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I go about fine tuning Strelok's BC and validating trajectory data a little bit differently, by using actual projectile impact and reticle holdover marks at two known yardages, and tweaking the number from there. The process I use is basically shooting it in with the scope and changing numbers until the drop matches.
For example, using a close advertised BC loaded in Strelok, I shoot my scope zero at a known yardage, like 100. Then use my holdover data from Strelok, shoot way out, to like 200 yards or more. If Strelok said to use 29 MOA mark as a holdover and the group hit 1 MOA up, at 28, then 28 is the actual holdover to group bullseye at 200 yards. So I would then shoot a group using 28 MOA holdover to verify, and change the program to keep adding or subtracting tenths to that BC number in Strelok until the new BC number made the holdover chart match (28 at 200 in the example) exactly. Shooting various long range yardages to validate. This can be done at shorter ranges as well, and be just as accurate, and is actually important to set the BC within the distance range that you normally shoot.
I do the same type of process to get a true scope height number for Strelok, after getting a good long range BC validation. As the scope height matters a lot more (using Strelok) at short yardages.
For example, using a close advertised BC loaded in Strelok, I shoot my scope zero at a known yardage, like 100. Then use my holdover data from Strelok, shoot way out, to like 200 yards or more. If Strelok said to use 29 MOA mark as a holdover and the group hit 1 MOA up, at 28, then 28 is the actual holdover to group bullseye at 200 yards. So I would then shoot a group using 28 MOA holdover to verify, and change the program to keep adding or subtracting tenths to that BC number in Strelok until the new BC number made the holdover chart match (28 at 200 in the example) exactly. Shooting various long range yardages to validate. This can be done at shorter ranges as well, and be just as accurate, and is actually important to set the BC within the distance range that you normally shoot.
I do the same type of process to get a true scope height number for Strelok, after getting a good long range BC validation. As the scope height matters a lot more (using Strelok) at short yardages.
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