Hi,

I have just recieved my brand new Kestrel 5700 Elite with Link, and have run into the following problem I hope you can help me solve.

It seems that the Kestrel is adding waaay too much spin drift, and I can't find where I have put "garbage in" to get "garbage out" - please help!

I have added the folowing gun model for the Lapua Naturalis (I am yet to measure the MV, so the 798 m/s is a guesstimate):

MV: 798 m/s

DM: G1

BC: 0.201

BW: 9.1 gm

BD: 6.71 mm (bullet lenght is automatically calculated from BC and BD)

ZH: 0.00 mm

ZO: 0.00 mm

RT: 1:21.00 cm R (one revolution pr. 210mm on my 56 cm Schultz & Larsen barrel)

BH: 5.15 cm

ZR: 100 m

When having set Tgt to 500m and Wind to "None" (W1: 0 m/s W2: 0 m/s), I am getting the following firing solution:

E: 7.18 Umil

W: 2.57 Lmil

The elevation seems plausible, but not the windage! - when I go to the Kestrel ballistic menu, to see the contributors to the windage, I see that spin drift is adding 2.51 Lmil and Coriolis 0.06.

When I turn off Spin drift, I get the following firing solution:

E: 7.18 Umil

W: 0.06 Lmil

As I don't believe the magnitude of spin drift to be true, I have run the same parameters in StrelokPro and got E: 7.2 Umil (Great!) and W: 0.1 Lmil, which is plausible.

What am I doing wrong in the Kestrel?

----

The first thing I did after having unpacked the Kestrel was to update it through the iPhone APP, so I am running:

Model: 5700AL

SN: 2269015

FW: 1.23

BOOT: 1.01

BLE: 0.06

BAL: 44

HW: Rev 11B

Best regards,

Dennis

I have just recieved my brand new Kestrel 5700 Elite with Link, and have run into the following problem I hope you can help me solve.

It seems that the Kestrel is adding waaay too much spin drift, and I can't find where I have put "garbage in" to get "garbage out" - please help!

I have added the folowing gun model for the Lapua Naturalis (I am yet to measure the MV, so the 798 m/s is a guesstimate):

MV: 798 m/s

DM: G1

BC: 0.201

BW: 9.1 gm

BD: 6.71 mm (bullet lenght is automatically calculated from BC and BD)

ZH: 0.00 mm

ZO: 0.00 mm

RT: 1:21.00 cm R (one revolution pr. 210mm on my 56 cm Schultz & Larsen barrel)

BH: 5.15 cm

ZR: 100 m

When having set Tgt to 500m and Wind to "None" (W1: 0 m/s W2: 0 m/s), I am getting the following firing solution:

E: 7.18 Umil

W: 2.57 Lmil

The elevation seems plausible, but not the windage! - when I go to the Kestrel ballistic menu, to see the contributors to the windage, I see that spin drift is adding 2.51 Lmil and Coriolis 0.06.

When I turn off Spin drift, I get the following firing solution:

E: 7.18 Umil

W: 0.06 Lmil

As I don't believe the magnitude of spin drift to be true, I have run the same parameters in StrelokPro and got E: 7.2 Umil (Great!) and W: 0.1 Lmil, which is plausible.

What am I doing wrong in the Kestrel?

----

The first thing I did after having unpacked the Kestrel was to update it through the iPhone APP, so I am running:

Model: 5700AL

SN: 2269015

FW: 1.23

BOOT: 1.01

BLE: 0.06

BAL: 44

HW: Rev 11B

Best regards,

Dennis

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