Home Forums Hunting & Shooting Long Range Hunting Tall target test

Great write up bsa. Appreciated on my end for sure, will need to do this myself soon

Thanks Cert, I appreciate it! It would be cool to see how the scope I sold you fares. I'll bet it will be spot on. I hope you guys had a great Thanksgiving.

Good test if you do everything right. IE.. action is precisely level, scope is mounted precisely level and reticle travels precisely vertically to the center or the earth, bubble level mounted simultaneously to ensure everything is aligned when doing the shooting


Or you can have your scope mounted precisely (accurate to .001” at 6”), ran through its entire travel while aligned with a laser-leveled, precisely marked board in MOA and Mil, and anomalies noted while the barreled action is held in a heavy fixture.

And not shoot 20 rounds






If any discrepancies are noted in travel dialed to actual movement, the actual click values can be calculated and input into your ballistic program to have perfectly accurate output solutions


But if you can’t send your rifle and scope to Score High Gunsmithing for the precision mount, the tall target test will do if you have the time to devote

BSA, I suspect your scopes are actually tracking as they should, I have owned several NF scopes and checked I think 3. ALL of them track spot on and have ZERO error I could find. I can detect a tracking error within 1%. This brings up an issue I have talked about for years but the board mocks me and makes fun of my methods. Frankly I don't care because I know what I have come up with works. if it didn't I would quickly see the scopes not RTZ if they moved and weren't held firmly. IMO there isn't a way to truly test tracking unless its done statically and mounted in or on something that allows the scope to be adjusted without shooting it. Nightforce actually tests this in their factory, They themselves test tracking without shooting it, but rather banging it and putting back in their own fixture.

The problem with actually shooting the gun to check this is even on a steady benchrest your zero can wonder slightly. Bench technique is hard to maintain exactly enough because how the gun recoils off the bags effects its zero, heck even the way you are sitting at the bench does too. I see this magnified with my AR15's because the form of the rifle is hard for me to have consistently ride the shooting bags. Then of course you have accuracy of the rifle, which may be effected by barrel heat and lots of other factors.

lastly recoil resistance and holding zero. I personally think the actual scope will hold zero better than most people think, I have a theory that what people are seeing is scopes shifting in the rings ever so slightly, which is often seen in some sort of impact, which could include recoil.


kudos to you for testing this BSA, I wish more people would. it also shows you're interested in what exactly is happening.

Interesting, however the ATACR is spot on on every test I've done with it. The SHV on the Winchester model 70 308 also holds true in these tests. The 3 other Nightforce SHV 5-20x56 are showing the same exact issue. They climb ever so much with each increment on the dial. I see that as a mechanical issue within the scope itself. Like I said in an earlier thread though, this does not matter as much as some would think, as long as you know it's happening and you verify on hard targets at distance. One reason, among a few, that ballistic calculators have always been close, but not exact.

These tests are great for those wanting to make sure their scope is tracking true in the vertical plane, along the vertical axis. However, as some have mentioned before, what will get you is the wind. It will also show if you cant your rifle and your scope is not level to the world when you pull the trigger. Those that are interested, should check out their equipment to make sure there are no huge variances in the tracking, as well. I'm sure we have seen some scopes that showed weird results, even when trying to zero a rifle at 100 yards.

Just the science behind this, if a test shows me that a certain scope is tracking in a certain manner (even after a few tests), I can ascertain that the mechanicals of the scope are causing it. Not saying that they are bad, just that maybe the pitch on a screw inside the adjustment system may be slightly askew. Again, some of you guys should shoot this and see how your equipment fares. There's only one way to find that out, and a static test is often times misleading. Actual real world recoil from the rifle is the only way to be totally sure about what it's going to do in the field.

Method seems solid.........

Adapt, Improvise, Overcome.

I remember being taught Gradians at one point in time. 100 grads = 90 deg. Seems easier than Milrad.

That joker must be trolling for a visit from the homicide investigators.

Yeah! What an idiot!

Spot on

Guy has to be kin to Big Stick.

Totarry!

Still as classic as its original release date…

Agreed. Makes my guts hurt I laugh so hard.

Scope manufacturers do not, however. March got caught up in this early on when they were using 6400 “MRAD” per revolution. People thought the scopes were adjusting incorrectly until it was discovered that March was using the old military standard. They then changed to the proper 2000*pi mrad per revolution, like everyone else.

Math is the universal language, but we all need to agree on the rules, including rounding and approximation rules.

Since I'm not shooting artillery fire.....not worried about it!

https://www.24hourcampfire.com/ubbt...ic-uhd-hunting-scope-review#Post17363385

John

Interesting test...have you tried it at 50 yards? I am assuming you are shooting at 100 yards. I don't see how you can verify tracking when you have so many things which can affect your results that you can't control. What about the wind, repeatable bench technique, mirage, shooter fatigue, 3 shot groups, canting, and the inherent accuracy of the rifle? I wonder if shooting closer at 50 yards would allow you to get a closer approximation to verifying tracking. Moving the scope adjustments changes your point of aim, now you are using your point of impact to verify the change in point of aim. Just some food for thought. Testing like this and discussing it will get us all closer to the truth.