Kestrel 5700 Elite MV and DSF Trueing

[Sniper266]

Hello, im new to using a kestrel and trying to figure out what the best way to true my balsitic solutions is.
I know my MV for a 223 firing a 69gr tmk is 2882fps. Measured with a chronograph from the muzzle.

When shooting at 300 yards
My Kestrel tells me to come up 3.73moa
My actual adjustment is 2.75moa

My cal mv range is 719yds
My cal dsf range is 1033yds
My local range only goes to 887yds

-With ALL this information, what is the best way to proceed?
-I notive that the cal DSF appears to have 4 options to store different ranges?
-If i know my MV from a chrono, why would i want to adjust it at a further range?
-how is the DSF different?
-can i use both?

-Shouldnt i use a BC adjustment?

 

[kthomas]

You should not be that far off from the ballistic software at 300 yards. One or multiple of your inputs into the program are wrong.

 

[Kobyashi72]

Hello, im new to using a kestrel and trying to figure out what the best way to true my balsitic solutions is.
I know my MV for a 223 firing a 69gr tmk is 2882fps. Measured with a chronograph from the muzzle.

When shooting at 300 yards
My Kestrel tells me to come up 3.73moa
My actual adjustment is 2.75moa

My cal mv range is 719yds
My cal dsf range is 1033yds
My local range only goes to 887yds

-With ALL this information, what is the best way to proceed?
-I notive that the cal DSF appears to have 4 options to store different ranges?
-If i know my MV from a chrono, why would i want to adjust it at a further range?
-how is the DSF different?
-can i use both?

-Shouldnt i use a BC adjustment?

Here's the Kestrel Instructions
https://kestrelinstruments.com/mwdownloads/download/link/id/241/

MV calibration is a fine tune adjustment that’s done at the range where your systems’ remaining velocity reaches 1340 fps (Mach 1.2 - edge of the supersonic range) In your specific circumstance that’s 719 yards - this is the range where the shooter can see all the cumulative errors in the span of the trajectory.

(Which can include Scope tracking errors that weren’t checked. shooting azimuth not entered. wrong Sight height, Errors in the 100 yard zero. Ranging errors. Variations between the test gun used to measure the BC and your gun etc) The MV will be adjusted to compensate for these “overlooked” errors which can result in a larger variation than what's being reported by the chronograph

Firing Solution Check list
http://appliedballisticsllc.com/Articles/Firing Solution Check List.pdf

DSF Is done to calibrate the trajectory in the subsonic region (by adjusting the “Drag” not BC) if you're not shooting out to those distances with a 223 (1000 yds and beyond) on a regular basis then don't worry about it.

BC tuning is a strategy if you don’t have access to the extended ranges required to use the “Cal Mv” feature particularly with the faster calibers like the 6.5 CM and 260 Rem. You can also use a stepped BC or use the CDM in the case of the Kestrel

(in the case of the CDM a strategy you can use if you don't have access to the recommended range to use the "Cal MV" feature is to adjust the mv manually in 5 fps increments until you average out the trajectory path to the distance you used as the “calibration point” (e.g. “800 yards” or the max range the local range has available) if you haven’t got the trajectory lined up by the time you’ve reached the SD of your ammo or 30 fps (1% of the MV average) There’s most likely error elsewhere that's causing you to be off

Check the Firing Solution Check list
http://appliedballisticsllc.com/Articles/Firing Solution Check List.pdf

 

[Kestrel Ballistics]

Check that you are using current fw-1.23 in the Kestrel, and that you have built your gun profile in the App using the Custom Curve for the bullet, it is in the library.

 

[nexusfire]

Sight height is important. Measure from the center of the bolt to the center or the windage knob.