horus kestrel 4500 nv

hollowpoint · 02-01-2015 12:45pm #1

Anyone any experience using one? Bought 1 few months back but my point of impact is no where near where it's supposed to be when i have dialled on the elevation solution its given me.... ???

Cass · 02-01-2015 4:27pm

I don't have one, as i've never seen the need for one, but how accurate is the info you're inputting? What distance are you shooting?

hollowpoint · 02-01-2015 5:10pm

Cass wrote: »

I don't have one, as i've never seen the need for one, but how accurate is the info you're inputting? What distance are you shooting?

Was happy with the info i put in... chronographed the ammo i was using and all the weapon data i input i feel was accurate. Was shooting out to 864mtrs with 168grn HPBT hornady match ammo... so for example the solution for elevation i was given was a full mil more than what was required to hit the target... weather conditions where perfect, not a breath of wind....

Cass · 02-01-2015 6:04pm

Not too sure without seeing it in action, but one thing i would say. I tried 168 gr target rounds and they were approx 3 feet "off" where they should have been. Not to mention slightly more prone to the wind. This is all from memory so the figures may not be exact, but will give you an idea.

Mine (168 gr) were always lower. So 155 were spot on, but:

168 were 30" (or average) lower
175 were 10" (or average) lower
190 were 18" (or average) lower
200 were 26" (or average) lower

In terms of windage the 155 were spot on, but (left to right):

168 were 20" right (with wind)
175 were 0 - 5" right (with wind)
190 were 4 - 9" left (into wind)
200 were 10 - 14" left (into wind)

This was with a 32", 1:12 twist barrel all at 1,000 yards. The 168 gr consistently performed the worse and contrary to what you'd both expect and some ballistic calculators said they would.

hollowpoint · 02-01-2015 7:43pm

Cass wrote: »

Not too sure without seeing it in action, but one thing i would say. I tried 168 gr target rounds and they were approx 3 feet "off" where they should have been. Not to mention slightly more prone to the wind. This is all from memory so the figures may not be exact, but will give you an idea.

Mine (168 gr) were always lower. So 155 were spot on, but:
[LIST
[*]168 were 30" (or average) lower
[*]175 were 10" (or average) lower
[*]190 were 18" (or average) lower
[*]200 were 26" (or average) lower
[/LIST]

In terms of windage the 155 were spot on, but (left to right):
168 were 20" right (with wind)

175 were 0 - 5" right (with wind)

190 were 4 - 9" left (into wind)

200 were 10 - 14" left (into wind)

This was with a 32", 1:12 twist barrel all at 1,000 yards. The 168 gr consistently performed the worse and contrary to what you'd both expect and some ballistic calculators said they would.

wow 168gr differed that much! I presumed with spending money on good quality match ammo i would have got better results, will try different weight and see how that goes!

Cass · 02-01-2015 10:28pm

What are you using? Barrel length, twist rate, etc.

hollowpoint · 02-01-2015 11:20pm

Cass wrote: »

What are you using? Barrel length, twist rate, etc.

Remington 700 vsf .308 1:12 26" barrel...

Cass · 02-01-2015 11:41pm

You are pushing the limits of the rifle.

The rifle will shoot to 900+ yards, but usually with reloaded ammo or some much better factory stuff. I've used factory ammo, about the best money can buy, out of a 24" barrel Remington and after 800 yards even the best of it struggles to maintain groups let alone good groups. The device will give projected drops based on a set of numbers. IOW how the bullet should act, not how it will act.

I still think the 168's are the problem. They are unusually slow for a lighter bullet. Try 155 stuff. Much better speeds, and better results. Look out for Lapua, or Sierra. However if you can find anything with Berger 155s then go for it.

As i said above when i used the 168s they performed completely counter to what the BC and common sense predicted.

hollowpoint · 02-01-2015 11:55pm

Cass wrote: »

You are pushing the limits of the rifle.

The rifle will shoot to 900+ yards, but usually with reloaded ammo or some much better factory stuff. I've used factory ammo, about the best money can buy, out of a 24" barrel Remington and after 800 yards even the best of it struggles to maintain groups let alone good groups. The device will give projected drops based on a set of numbers. IOW how the bullet should act, not how it will act.

I still think the 168's are the problem. They are unusually slow for a lighter bullet. Try 155 stuff. Much better speeds, and better results. Look out for Lapua, or Sierra. However if you can find anything with Berger 155s then go for it.

As i said above when i used the 168s they performed completely counter to what the BC and common sense predicted.

I'm more akin to using an AI 26" 1:12 firing lapua 170 grn so i had an idea of what kinda dialing i shud be doung my my .308. I know you cant make a silk purse out of a sows ear but i got a gud bit done with the gun when i bought it, put d schmidt a d bender pm 2 and same 1 piece mounting bracket on and cosine indicagor aswell as anti cant level.... more money then since i reckon! So i knew at various ranges what roughly i shud b dialling on and when d kestrel was giving me say 12.5 mils for 864mtrs when in reality it might have only took say 10.8 or in dat ball park figure...

Cass · 03-01-2015 12:12am

hollowpoint wrote: »

............. when d kestrel was giving me say 12.5 mils for 864mtrs when in reality it might have only took say 10.8 or in dat ball park figure...

I'll admit to knowing more about MOA for long range stuff as it's easier to work out but a 1.7 mil difference at 940 yards is roughly 57 inches. That is a huge difference.

What speeds are you getting and what bullet are you using? Want to run it through my own BC to see what figures i'm getting.

hollowpoint · 03-01-2015 9:43pm

Cass wrote: »

I'll admit to knowing more about MOA for long range stuff as it's easier to work out but a 1.7 mil difference at 940 yards is roughly 57 inches. That is a huge difference.

What speeds are you getting and what bullet are you using? Want to run it through my own BC to see what figures i'm getting.

Apoligies for the delay, thought i sent it lastnite.... range was 864mtrs, kestrel was giving me .22 left for zero wind and elevation of 10.78 mils. Chronographed 10 rds and averaged at 2608 fps. 168 grn hpbt hornady. Sighting in range 100mtrs. Center of scope to center of bore 2.56 inches. Barrel 26" 1:12

hollowpoint · 03-01-2015 9:53pm

Cass wrote: »

I'll admit to knowing more about MOA for long range stuff as it's easier to work out but a 1.7 mil difference at 940 yards is roughly 57 inches. That is a huge difference.

What speeds are you getting and what bullet are you using? Want to run it through my own BC to see what figures i'm getting.

Apoligies for the delay, thought i sent it lastnite.... range was 864mtrs, kestrel was giving me .22 left for zero wind and elevation of 10.78 mils. Chronographed 10 rds and averaged at 2608 fps. 168 grn hpbt hornady. Sighting in range 100mtrs. Center of scope to center of bore 2.56 inches. Barrel 26" 1:12

Cass · 03-01-2015 9:55pm

Just ran it through my BC and it's giving me 10.9 mil for 950 yards (870 mtrs).

hollowpoint · 03-01-2015 9:58pm

Cass wrote: »

Just ran it through my BC and it's giving me 10.9 mil for 950 yards (870 mtrs).

There was a picatinny rail on the gun already when i bought it 2nd hand with only 100 rds put through it.... i wonder would der be m.o.a built into the rail? Would dat affect it..?

Cass · 03-01-2015 10:03pm

The smallest picatinny rail i've seen are usually 10 MOA which is 2.9 mil. Add that to your 10.8 actual drop and you get 13.7 mil. A full mil off where the Kestrel is telling you to adjust to.

Also a rail has no bearing on adjustments made after zero. All it does is reduce the amount of adjustment (on your scope) needed to get your zero. So once you have your zero the adjustment is still 10.8 mil to the distance you are shooting. The rail does not take off this adjustment.

hollowpoint · 03-01-2015 10:12pm

Cass wrote: »

The smallest picatinny rail i've seen are usually 10 MOA which is 2.9 mil. Add that to your 10.8 actual drop and you get 13.7 mil. A full mil off where the Kestrel is telling you to adjust to.

Also a rail has no bearing on adjustments made after zero. All it does is reduce the amount of adjustment (on your scope) needed to get your zero. So once you have your zero the adjustment is still 10.8 mil to the distance you are shooting. The rail does not take off this adjustment.

All seems to be pointing to the ammo, would u reckon that?

Cass · 03-01-2015 10:18pm

Unfortunately, no.

The ammo, according to what you said above:

when d kestrel was giving me say 12.5 mils for 864mtrs when in reality it might have only took say 10.8

..... and with what i am getting with my BC all points to the ammo doing exactly what it should do. It might not be the best ammo available in terms of long range stuff, but it's doing what is should. This means your Kestrel is not giving you accurate information.

As i said above if it's giving you 12.5 mil and it actually takes 10.8, a 1.7 mil or 57 inch difference then the only problem is the Kestrel.

hollowpoint · 03-01-2015 10:44pm

Cass wrote: »

Unfortunately, no.

The ammo, according to what you said above:

..... and with what i am getting with my BC all points to the ammo doing exactly what it should do. It might not be the best ammo available in terms of long range stuff, but it's doing what is should. This means your Kestrel is not giving you accurate information.

As i said above if it's giving you 12.5 mil and it actually takes 10.8, a 1.7 mil or 57 inch difference then the only problem is the Kestrel.

hmmm.... an incorrect b.c. then? There is a "truing option" on the kestrel...

Cass · 03-01-2015 10:48pm

Your input data should be:

Bullet - 168 gr
Speed - 2608 fps
Scope height - 2.5
BC - 0.450
HASL - 150 ft
Humidity - 75%
Pressure - 29.5 (hg)
Temp - 8 degree
Zero - 100 yards
Range - 1,000 yards
Interval - 50 yards

I don't bother with windage unless i want to know it. In this case you're only looking for elevation. This is all G1.

hollowpoint · 03-01-2015 11:04pm

Cass wrote: »

Your input data should be:
Bullet - 168 gr

Speed - 2608 fps

Scope height - 2.5

BC - 0.450

HASL - 150 ft

Humidity - 75%

Pressure - 29.5 (hg)

Temp - 8 degree

Zero - 100 yards

Range - 1,000 yards

Interval - 50 yards

I don't bother with windage unless i want to know it. In this case you're only looking for elevation. This is all G1.

I input all dat into the kestrel and c how it goes!

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horus kestrel 4500 nv

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