Thread: Sighting 200 yards at 100 yards

Originally Posted by sheep

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The Sako Ballistics App indicated POI 2cm up at 100 yds. Should I adjust base on 2 inches instead?

That s telling you 5 clicks down, 5 clicks in Mrad which is 50mm or basically without splitting hairs is 2inches.

That app is confusing stating inches then cm.

As above everyone elses comments.

Non magnum non dial I zero at 200y ....generally 2inch or close to high at 100y
Dialable scope I zero at 100 but walk around with 2moa dialed on for quick no need to range it shots sub 300y

50m zero generally on again @ 200 and 3in high @ 100

Originally Posted by sheep

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The Sako Ballistics App indicated POI 2cm up at 100 yds. Should I adjust base on 2 inches instead?

That screenshot says Impact Point (in), then up 2cm, so could be inches rather than cm

Originally Posted by Micky Duck

I posted that rule of three......

i couldnt remember who posted or what thread but im glad i saved it thanks for putting it up originally

Originally Posted by 223nut

Is that speed chronographed? 2800 seems a little slow, I'm getting 2850 out of my factory length tikka with factory Hornady whitetail 150gr. Agree with above rule of thumb, 2" high at 100m = bang on at 200

That speed is from Sako Ballistics database for Sako Gamehead 150g.

did you manage to get pointblank to work for you bud???

Originally Posted by sheep

That speed is from Sako Ballistics database for Sako Gamehead 150g.

If you get the chance run it over a chronograph the box can be very misleading

The speeds they put on the box, or on the internet info are basically, always worked off a 24" barrel, and in 308s case with a 1/12 twist. So your Tikka will have a 1/11 twist and a 22 inch barrel, so you can expect to loose ~ 150 fps, which changes things slightly.
As mentioned before By GP have to tune each load and rifle by testing at distance, it's the only way.

I tend to ignore the charts and diagrams and with a new rifle, I shoot a group at 50m, 100, and 200m. You might go through a packet of ammo, but you get the confidence of knowing where your rifle shoots at each distance. Then practice at estimating those distances.

Here's me shooting an 100m sighted in at 200M

Originally Posted by Micky Duck

did you manage to get pointblank to work for you bud???

Not yet. Plan to do it after 200 yd sighted in.

Originally Posted by 223nut

If you get the chance run it over a chronograph the box can be very misleading

Will do it at some stage

Originally Posted by flock

Here's me shooting an 100m sighted in at 200M
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Nice group at 200 yd.

Will shoot 200 yd target to see if the 2inch rule works.

Originally Posted by Arthur McBride

Those square on that target are half inch squares right? So the group is one inch high?

Move it up another inch and call it good.

The theory works fine, as long as you are using velocity that is not dramatically different. But mostly its about right because 200 metres is not that far away. Sight it in as you have done, and go hunting. I will take anything between 1 - 3 inches high at 100 metres. I hardly ever shoot anything over a 100 metres anyway...

Yes, half inch squares target.

Noted, thanks mate.