Accuracy at 1000 mtrs

[woody]

That is the same bullet and speed (within 5 f/s) that I am using, for 1000 yards Strelok+ is telling me 32.37 MOA which is 129 clicks and for 1000m it is 37.88 MOA or 152 clicks.

Is your target set at 1000 yards or metres and is the app you are using set to the same units?

Also you say you don't like the set up of the Sphur as it isn't on your eye level - if you aren't getting a consistent head placement each time this can have an increased detrimental effect on accuracy at the longer distances compared to short range.

Set to metres, I was on 130 clicks for 1000 and it was still shooting high and slightly to the right. I doubled checked my data which I right down when it goes right, at 800 it was 80 clicks, just inputted 800 again and it said 84 clicks, could explain, now changed my BC back to 0.578 rather than 0.246 which it was on today.

 

[Ronin]

Start again

Check all on rifle scope mounts and rings are torqued up

Get your cheekpiece set to a height you have proper eye box in scope from RESTING position (behind rifle cheek on cheekpiece look through scope, close eyes and re open with rested face on cheekpiece Re open eyes if you have no view through scope ajust cheek and re try

Once that’s set properly move on to re zero and grab all base data

Then start verifying at longer ranges

This procedure works

Will assist you getting first round hits at multi distances

I appreciate your starting out and getting advice from many

Work on simple fixes that work and are proven

 

[User00033]

Using your ballisticss, I charted what you said about hitting at 800m and being high and right at 1000. Doesn’t make sense.

Do the exercise yourself, you’ll see what I mean. Look at what happens to the bullet under normal conditions between 800 and 1000m.

Assuming no change to environmental conditions or shooting position, something must have changed in your setup.

I am suspicious about the bonnet. A sloped platform can create problems under recoil. Which way was the vehicle facing, left or right? If there is a bounce and slight shift under recoil, that can explain your 1000yd problem easily. But only if you were doing something different for the 800m shots.

As mentioned above, lots of potential causes. But it will be quite fundamental and should be easy to identify if you go back to first principles and replicate you shooting methodology exactly for both 800 and 1000m shots.

 

[Ronin]

Long range (moderate long range ) to 1000 is no black art

Accurate rifles and repeatable consistent loads allow anyone to connect at distance providing they have the fundamentals nailed

 

[Outback]

My normal elevation for 1000 yds is 7.02 mil on a calm day muzzle velocity is 2957 temp 6/8 degs ,
Recently elevation 6.7 temp 10 degs , 4 oclock 7mph wind and strong crossing wind left to right down near target , 1 mil windage .
The terrain temp and windage are all having huge variable influences on the shot so unless you can mark the shot and don't miss a wind change or drop of you've got it all to do . It would be different if you could get in a full value wind position , different rules again .

 

[User00033]

Long range (moderate long range ) to 1000 is no black art

Accurate rifles and repeatable consistent loads allow anyone to connect at distance providing they have the fundamentals nailed

True, to a point.

But with a light bullet, the wind is a devilish mistress.

 

[Edinburgh Rifles]

BC is as much marketing as it is measured data

only the bullet tells the truth!
true your data at intermediate ranges

Humidity and pressure can have a big effect at 1000yds
just play around with the app and see what they do to the predicted drops

 

[User00033]

Every single one of my loads requires a trajectory validation. Not one of them performs at 500m or 700m how the assumptions into the ballistics apps say they will, e.g. BC, chronograph velocity. Drop testing in 100m increments is mandatory if a shooter is serious about long range gong shooting. Its also great fun and highly informative.

 

[woody]

Back to the drawing board and will work up, thanks for the advice.
Cheers

 

[xavierdoc]

Lots of good advice which I won't repeat bug would add:

Crap in=Crap out (data)

Check the measurements you are inputting are correct.

Eg: Do not take forgranted that your range is actually 100yds, nor that your laser rangefinder, etc is accurate.

Check scope axis height above bore
Check scope is not canted and check you aren't canting when you shoot
Do a stern tracking/box/tall test of your rig
Try doing a slo-mo video from various angles of yourself shooting (most modern smartphones and cameras can do this now)
Check whether the position/angle you have to adopt to engage the 1000yd target is the same as the 800yd.
Try a smaller gong at 800; do you now miss by a similar angle of arc and same direction as at 1000?

Good luck

 

[Muir]

True, to a point.

But with a light bullet, the wind is a devilish mistress.

If you can't see the wind down range you won't hit the target. I shoot over twisting. open terrain in a place where a windless day is 5 mph. "Sporty" winds can hit 30 mph and they are seldom blowing all in the same direction at every point between the muzzle and the target. Ditch the gadgets and watch the mirage.~Muir

 

[woody]

I put a wind sock up down range, near perfect conditions

If you can't see the wind down range you won't hit the target. I shoot over twisting. open terrain in a place where a windless day is 5 mph. "Sporty" winds can hit 30 mph and they are seldom blowing all in the same direction at every point between the muzzle and the target. Ditch the gadgets and watch the mirage.~Muir

 

[woody]

Lots of good advice which I won't repeat bug would add:

Crap in=Crap out (data)

Check the measurements you are inputting are correct.

Eg: Do not take forgranted that your range is actually 100yds, nor that your laser rangefinder, etc is accurate.

Check scope axis height above bore
Check scope is not canted and check you aren't canting when you shoot
Do a stern tracking/box/tall test of your rig
Try doing a slo-mo video from various angles of yourself shooting (most modern smartphones and cameras can do this now)
Check whether the position/angle you have to adopt to engage the 1000yd target is the same as the 800yd.
Try a smaller gong at 800; do you now miss by a similar angle of arc and same direction as at 1000?

Good luck

Crap in crap out exactly, I think that happened, it looks like I had a G1 bullet but with G7 data on strelok, won't be able to confirm until next outing.

 

[Yorric]

I don't think that G1 or G7 wrong setting explains why there was a sideways error on your previous attempt at 1000 Woody. That may be due to something else.
Unless spin drift or Corriolis has that much influence. ????? Maybe?????
Ian

 

[Ronin]

You’ve had several suggestions of what could be wrong both on here and on UKV from experienced people including a very knowledgable ballistition who developed a firing solutions package for non civilian use ,,,,

Suggest return to baseline and go from there

 

[RCS Deer Management]

As has been said, crap in = crap out. Get an experienced shooter to look over your kit and your data. With good bullets (accurate bc) and accurate mv you should be able to go out to 1000m with no ‘trueing’. I think 99% of the time ‘trueing’ = bodgeing the bits you don’t understand.

 

[woody]

I don't think that G1 or G7 wrong setting explains why there was a sideways error on your previous attempt at 1000 Woody. That may be due to something else.
Unless spin drift or Corriolis has that much influence. ????? Maybe?????
Ian

Yep that's a strange one, the vehicle was parked facing to the right, when I was shooting off it. When I had the scope fitted and leveled it does not look level to my eyes so when I look the the scope and level the cross hair and check the level in the Sphur it is not straight. It looks like the ret is canted to the left, but then it could be my eyes.

 

[CarlW]

Yep that's a strange one, the vehicle was parked facing to the right, when I was shooting off it. When I had the scope fitted and leveled it does not look level to my eyes so when I look the the scope and level the cross hair and check the level in the Sphur it is not straight. It looks like the ret is canted to the left, but then it could be my eyes.

Woody, mate,

Stop chasing shadows and do what Ronin said. You'll drive yourself mad if you run after every ghost.

Kindest regards,

Carl

 

[woody]

I have changed to a weatherflow weathermetre and things have improved upto 800 metres now, and that is with a 5 mph wind, hoping to stretch the legs on this to 1000 but will be on the deck.

 

[Dunwaters]

I really enjoy my stalking, but have started to do field work on gongs now, I want to learn to shoot out to longer ranges for fun!
My chosen flavour is. 260 for this in an Accuracy International rifle.
I can hit a 30" gong at 800 but missing at 1000mtrs, I am using both a kestrel and strelok and both give the same readings, I seem to be shooting 3 ft high and to the right. Why?
Is there something else I need to input into the devices.
Any feedback from people who do this would be great.
Cheers

Spin drift?