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Went to try out my .260 at longer range and to daily up for the loads I use so put all the data into app and dialed of required all going well until 580 yards and two shots real low others were all good enough for me and hunting.
Any ideas why? ?
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This is the target showing 200,300,400 and 580 yards not sure whey the drop at 580 after dialing up correct amount.
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Perhaps bc is a little bit out or maybe velocity, the forces on the projectile becoming more noticeable the further out you go. The gravitational pull and wind resistance (what ever direction its coming from are acting upon the projectile for a longer time... What you have is the actual real data you want! (if weather conditions were good). Take your measurements from the bull a confirm actual drop a 580 yards. Some further data out to 800 or something would give you a very accurate drop chart. Gseven ballistic program has a good trajectory validation feature that I didn't find in the likes of the free strelok app.
Cool thanks for that I will try another lot at 5,6,7 and 800 yards to get actual drop.Quote:
Originally Posted by deepsouthaussie
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Still. It is bloody shooting well.😆Quote:
Originally Posted by 25/08IMP
Did you change have to shift your firing point or just the target?
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Yea had to move position and a lot more wind to deal with.
I'm still happy as its a dead animal.
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Was that the only two fired at 580?
Sure is. The vertical shift could just be a minor position adjustment as well.
Do you use a rear bag?
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Yea rear bag and bipod and only two at 580 with my .260AI and 143 hornady
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Yea need to find a spot to shoot all from the same spot at different ranges.
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100% sure you dialed enough? Seems way off when you look at the others
Yea that's what I thought so Re input range and checked number of clicks as I thought it was shit hot out to 400 then went back to 580 and 140mm drop.
So does that mean I'm 4 clicks out or have I got that wrong?
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Yeah by my calcs you're a bit less than 1 MOA low (4ish clicks)
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Im picking the change in position altering rifle support is the culprit but someone has said that already so I'm agreeing with them. Well known effect amongst target shooters.
Cool thanks for the help guy's
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I can understand how shooting position can alter POI and flex in less rigid stock designs with loading the bipod differently ect. But assuming you altered shooting position each range and only had results that didn't match at the last range seems like something else? The more experienced guys know best though I'd trust in their assumptions.. More shooting and verifying would have to be the best way to go though...
[QUOTE=deepsouthaussie;469073]I can understand how shooting position can alter POI and flex in less rigid stock designs with loading the bipod differently ect. But assuming you altered shooting position each range and only had results that didn't match at the last range seems like something else? The more experienced guys know best though I'd trust in their assumptions.. More shooting and verifying would have to be the best way to go though...[/QUOTE]
:thumbsup: yip, until then we are all pissing in the wind :D
Definitely agree with above, more verification is needed.
A shift in elevation due to position can be so subtle it's not funny.
Assuming bipod is loaded consistently (I personally do not load my bipod at all) the anomaly will start further back along the rifle due to hold and position on shoulder.
Also cheek weld can have an influence.
Try shifting everything and resetting up at 100 m between groups.
Unless you have a sound, consistent technique, you will get a change in MPI from POA😆
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Yea I think I need to Re shoot at the longer range to check things I'll keep you guys informed.
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I use Strelok+ seems to work on only used to 400m so far though and it only allows BC1 profiles.
Yea that's what I used as well and was fine out to 400 but 580 didn't seem to work as well but I will need to check it again.
You could be a mil click off. I reckon your bottom shot was a harder than usual hold but your shot slightly higher is about 1 click off if you're using a mil scope.
Some scopes need to be true'd using the turret adjustment on the app. My march needed this because some genius used the American artillery version of the mil system when designing it. I had to tweak it to 1.0182 to get it tracking correctly (both elev and windage)
Hey man make sure your using the g7 drag model.
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Any one know how to change Strelok from to G7
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only the most expensive one c an use g7Quote:
Originally Posted by 25/08IMP
Shooter uses both G1 & G7 FWIW
Can anyone if I give them the vol and BC of my load run it through their app so I can compare it with mine
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here is a good article on which one you should be using Ballistics 101: What Is Ballistic Coefficient? - The Firearm Blog
Cool thanks I'll have a look
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Yep fire away - what's your mv, projectile and scope type (mil or moa). Also barrel twist if you have it, guessing about 100m alt too.Quote:
Originally Posted by 25/08IMP
So you're 2.5" low at 580y so you'd be 6-8 clicks off your theoretical trajectory. We worked out you actually needed 45 clicks. Can you recall how many clicks you used for 580y?
Yea it was 45 clicks on Strelok
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