Thread: Sighting 200 yards at 100 yards

Need advise on novice question.

Wanted to zero my new scope at 200 yards for my 308 Tikka T3x but unable to do so. According to Sako Ballistics App, the POI is 2cm up at 100 yards if the zero is 200 yards. As such, I dialed the scope 2cm below POI at 100 yards. I was using Sako Gamehead 150g. (Photo: 5 shot group, 1cm square target)

Am I doing it right?

for a 308 you want your POI be about 2in high at 100yrds to give a 200 yd zero.

For that lone shot away to the left, if that was the very first shot, or it didn’t feel right in some way, flinch etc, I’d tend to call it a ‘flyer’ and ignore it from the group for zeroing purposes.

When you say you dialled your scope 2cm below POI, what was your process here?

Generally when adjusting the scope, you are shifting the POI around relative to the crosshair, rather than the other way around.

Was this the group you shot after all your adjustments?

if squares are in inches...6 clicks left and good to go.......if in cm....ummmmm 2 clicks left and 4 clicks up...should be close.

this was posted in another thread a while ago ....

Originally Posted by StrikerNZ

For that lone shot away to the left, if that was the very first shot, or it didn’t feel right in some way, flinch etc, I’d tend to call it a ‘flyer’ and ignore it from the group for zeroing purposes.

When you say you dialled your scope 2cm below POI, what was your process here?

Generally when adjusting the scope, you are shifting the POI around relative to the crosshair, rather than the other way around.

Was this the group you shot after all your adjustments?

The lone left shot was human error, my fault.

This group is after adjustment. Did not adjust windage because the wind is pretty strong and erratic.

I aimed the scope at the centre of the target, and dialed the elevation to achieve POI 2cm above at 100 yd.

Originally Posted by Micky Duck

if squares are in inches...6 clicks left and good to go.......if in cm....ummmmm 2 clicks left and 4 clicks up...should be close.

The squares are in inches. One square = 1/2 inch.

Greetings @sheep,
To me the best way to sight in at 200 yards (or 200 metres in my case) is to put the target at 200 yards. Otherwise you will only be guessing. If you expect to shoot at longer distances you need to check your Point of Impact out there as well. Most of us that have been around for a bit have seen some young hunter carefully zero a bit high at 100 yards and later hear tales of woe after an attempted long range shot, There is no substitute for validating your trajectory at longer range by actual shooting. You have plenty of ranges close to you.
All the best Grandpamac.

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

Originally Posted by grandpamac

Greetings @sheep,
To me the best way to sight in at 200 yards (or 200 metres in my case) is to put the target at 200 yards. Otherwise you will only be guessing. If you expect to shoot at longer distances you need to check your Point of Impact out there as well. Most of us that have been around for a bit have seen some young hunter carefully zero a bit high at 100 yards and later hear tales of woe after an attempted long range shot, There is no substitute for validating your trajectory at longer range by actual shooting. You have plenty of ranges close to you.
All the best Grandpamac.

Thanks for the advise. Will do

Hey @sheep

My "walking 200yd" zero for most medium calibers is 2 inches high at 100.

With that you should be very close to dead on at 50, 2 inches high at 100, close again at 200, and for the odd 300yd shot, aim about halfway from the shoulder crease to the top of the deer's back (roughly 4 inches low impact if you aim dead on).

Easy peasy

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

Originally Posted by sheep

The squares are in inches. One square = 1/2 inch.

3 clicks left,4 clicks up assuming target was shot at hundy.

I posted that rule of three...... yes go 2" high at hundy.....
tell you what
go to www.huntingnut
then up on left hand side bar you will see
pointblank online
click in there.
enter in the details you just showed...B.C. velocity etc
then enter it...you will get pretty curve and hard data at bottom...its easy,its free AND most importantly you can see WHY your sight in height matters...tootoo with sight in range..change it heaps and watch where bullet will be at different ranges....it will be plainly obvious where makes most sense
EG for my .223 it made more sence for me to be 1.5" high at hundy for the ranges I normally shoot.

Originally Posted by sheep

Attachment 180019

Attachment 180020

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.