Long range, ES vs Vertical

[Chrisjan]

Hi,

I am shooting a 6mm Dasher. My question is?

On 1000yard F-open shooting, is it better to load for the lowest ES but the magnetospeed has an input on your trajectory and mabey group size?
Or shoot without the magnetospeed and look for best group and best vertical and record speed for ballistic calculator afterwards?

Thank you in advance for your inputs
Chrisjan

 

[bsumoba]

develop the most accurate load you can and then get your velocity. accuracy > speed

 

[Lapua40X]

develop the most accurate load you can and then get your velocity. accuracy > speed

Ditto ... I can't imagine why anyone would do load testing with the magnetospeed on the rifle. Chronographs are for determining muzzle velocity - and nothing else.

 

[4xforfun]

develop the most accurate load you can and then get your velocity. accuracy > speed

Ditto ... I can't imagine why anyone would do load testing with the magnetospeed on the rifle. Chronographs are for determining muzzle velocity - and nothing else.

Yep....it would be like finding a load with a tuner and then taking it off for the match.

 

[Lapua40X]

... a different chronograph such as the LabRadar might end up being the best of both worlds.

I think that, if you can afford it, it certainly is the best of both worlds.

 

[Andr01d]

My experience with the magneto speed used during load development is that it certainly has an effect on group size, in my case .5 MOA with it mounted, and actual .25 MOA without, learned this the hard way trying to get to .25 MOA with magneto on the barrel, wasted time and components! I do use the magneto during ladder test , to me this its best time to use it, look for nodes on paper and velocity "plateau's" with magneto. at this point I am done with magneto speed. Pick a node and vary OAL, get best group on paper, then check ES SD with magneto. You just can't beat the set up time with the magneto.

 

[Joe R]

gstaylorg:

... a different chronograph such as the LabRadar might end up being the best of both worlds.

LabRadars are like a solar eclipse. Often mentioned but seldom seen.

Joe

 

[Jaxdilation]

In my case I use the Magnetospeed to determine velocity. But that's what your self-contradictory post said I think.
For assessing the statistical performance of a load and relate it to observed accuracy a non-attached chrony is the better
answer.

develop the most accurate load you can and then get your velocity. accuracy > speed

Ditto ... I can't imagine why anyone would do load testing with the magnetospeed on the rifle. Chronographs are for determining muzzle velocity - and nothing else.

 

[CharlieNC]

This is exactly why I bought a standard chrono instead of a MS. No big deal to take 5 minutes to set up, and no worry about altering harmonics.

 

[DocBII]

Good day,

Find and determine width of accuracy node, then find seating depth depth and velocity. Use whatever floats your boot for a chronograph after determining accuracy node.

HTH,
DocB

 

[barefooter56]

Chrisjan,
Standard deviation (SD) is a more important indicator than ES. SD is the indicator tied to the vertical dispersion of the load and 10 or less is what you want to try for. You will notice that as the SD goes down so does the ES. Do your load testing as far as finding the bullet seating depth accuracy node just using the target for information. When you get to your velocity accuracy accuracy node in the velocity range you need for the bullet to still be supersonic at 1000 yards you could do it 1 of 2 ways. Either do the powder charge work up and then retest the most accurate loads indicated on your test targets or do your velocity testing with the MAGNETO SPEED unit on the rifle. I would recommend testing first to see what if any affect the unit has on group size and /or group movement on the target. If the only affect it has is moving the group and not increasing its size then you could do your velocity testing with the unit on the rifle. IF you find have the unit attached does nothing to the group as far as size or placement on the target then life is good!!!

 

[savagedasher]

I think you must have both. ES shows vertical at any yardage. The difference between the two one may be in inches the other in thousands. Larry

 

[Corey Schwanz]

Load for accuracy, then find out what the speed is.

There are times when you will have to ensure you speed is fast enough to actually get the bullet to the target in which case I'd try to load develop through a normal freestanding chrono. But for most of my shooting, I just load test until I'm satisfied with the group, then chorno it to see how fast it happens to be. Then calculate drop charts as needed.

 

[M14AMU]

When I see.....WHAT I WANT TO SEE....on the face of the target with good calls and under a variety of conditions....I then know I've got the load right!! I couldn't give a rats azz less....about nodes or exact velocity!!