Zero question

[buckfever]

Just got a new rifle yesterday a tikka t3x .243. Was out last night setting scope. Set it about 2 inch high at 100 yards then tried it at 200 yards but was about 6 inch high? Went back tried again at 100 yards was 2 inch high then back to 200 yards and 6 inch high. Any reason for this just seems odd. Last 243 set 2 inch high at 100 and was dead on at 200. Using 76gr norma tipstrike. Think just set bang on at 150 yards and be done with it

 

[Dalua]

My first question would be 'Are your position and hold the same when shooting at 100yds as at 200yds?'

 

[buckfever]

Yes would say so. On bonnet with bipod. Tried 4 shots at 100 and 200 and each time was same outcome

 

[buckfever]

Tried 90 gr sako gamehead as well at 200 and that was about 4 inch high

 

[buckfever]

Top is sako 90gr and bottom norma 76gr

 

[takbok]

I would zero at 200/220y and then just confirm where it's shooting at other distances.

Is your scope mounted quite high by any chance, or differently to your last rifle?

 

[buckfever]

It sits lower than the last rifle. Was thinking about 150/200 than just work it out from there. Just left me a bit confused last night

 

[rem284]

What are you wanting to zero the rifle for. If it's 200 yards, then zero it for that. Then check it at 100 if that's an easier range for checking it in the future. It's all about the individual rifle, scope, ammunition and user.

 

[buckfever]

What are you wanting to zero the rifle for. If it's 200 yards, then zero it for that. Then check it at 100 if that's an easier range for checking it in the future. It's all about the individual rifle, scope, ammunition and user.

Set up for fox . That's what am thinking just left me about confused why so high instead of either bang on or a bit low

 

[takbok]

It sits lower than the last rifle. Was thinking about 150/200 than just work it out from there. Just left me a bit confused last night

Most of my rifles will be more like 1" high at 100y and zeroed at 200y. I'd expect your 243 would be very similar

 

[buckfever]

Most of my rifles will be more like 1" high at 100y and zeroed at 200y. I'd expect your 243 would be very similar

That's what a would have thought as well but if set 1 inch high would still be about 5 inch high at 200. Never had this before same with other boys av spoke to

 

[Dalua]

Yes would say so. On bonnet with bipod. Tried 4 shots at 100 and 200 and each time was same outcome

OK - so is your hold one of the tacticool ones, where you don't hold the forend and have your non-trigger hand under the stock?

 

[Smellydog]

I've had this argument many times.
Ballistic charts are guides only.
They are assumed values on perfect alignment of sights to bore.
Any deviation via mounts or action and the chart goes out the window.
Sounds like the front of the sight needs lifting. Or the rear lowering.

 

[rem284]

Set up for fox . That's what am thinking just left me about confused why so high instead of either bang on or a bit low

My .270 is 1.5 inches high at 100m gets me a 180m zero. This in practical terms means, point and shoot out to 220. If time allows at 220 I will click up .5moa

My 6.5-284 is 1.1 inches high at 100 gets me 180 zero

Some people assume 1 inch high at 100 gets a 200 zero and think it works in every single set up. Well it's a ball park figure but it's best to check and adjust accordingly. You did check, if you hadn't foxy-loxy might have just got a fright

 

[buckfever]

OK - so is your hold one of the tacticool ones, where you don't hold the forend and have your non-trigger hand under the stock?

Tried both as my old 243 had to hold forend but my 223 don't hold as it's the howa rubber stock

 

[buckfever]

My .270 is 1.5 inches high at 100m gets me a 180m zero. This in practical terms means, point and shoot out to 220. If time allows at 220 I will click up .5moa

My 6.5-284 is 1.1 inches high at 100 gets me 180 zero

Some people assume 1 inch high at 100 gets a 200 zero and think it works in every single set up. Well it's a ball park figure but it's best to check and adjust accordingly. You did check, if you hadn't foxy-loxy might have just got a fright

Definitely glad i checked as would have been left scratching my head.

 

[buckfever]

I've had this argument many times.
Ballistic charts are guides only.
They are assumed values on perfect alignment of sights to bore.
Any deviation via mounts or action and the chart goes out the window.
Sounds like the front of the sight needs lifting. Or the rear lowering.

Never used the charts just always set my rifles a inch or 2 high and been there abouts at 200 yards

 

[Dalua]

Tried both as my old 243 had to hold forend but my 223 don't hold as it's the howa rubber stock

I can't tell whether that's a yes or no - but if you were not holding the forend, I'd suspect that the bullet might be going higher at 200 than 100yds because of the rifle being allowed to recoil unrestrained.
In fact, even if you were holding it there might be bounce during firing depending on the flexibility of the bonnet and/or what's between the bipod feet and the bonnet (if anything).

All just speculation, of course...

 

[Smellydog]

Never used the charts just always set my rifles a inch or 2 high and been there abouts at 200 yards

Yes, I know but keep an open mind when acquiring a new rifle.
To be fair tikka actions are pretty dam good.
It might be worth a try checking mounts and or bases for built in moa and turn around.

 

[Smellydog]

I can't tell whether that's a yes or no - but if you were not holding the forend, I'd suspect that the bullet might be going higher at 200 than 100yds because of the rifle being allowed to recoil unrestrained.
In fact, even if you were holding it there might be bounce during firing depending on the flexibility of the bonnet and/or what's between the bipod feet and the bonnet (if anything).

All just speculation, of course...

Most standard rifle cartridges as this one the bullet has pretty much left the barrel before the full effect of the recoil.