Zero question

[buckfever]

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...

Tried holding and not holding both outcomes the same

 

[TURNBOLT]

When I had this same problem years ago it was the scope (Swarovski) which was faulty .

 

[buckfever]

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.

This all new to me as always put scope on set inch or 2 high and away I go

 

[buckfever]

When I had this same problem years ago it was the scope (Swarovski) which was faulty .

Had a faulty scope previously but the shots was all over the place. This time it's just higher than expected at 200 yard. Each time same poi whether 100 or 200 yards

 

[Dalua]

Tried holding and not holding both outcomes the same

Perhaps try holding with the forend hand rested on a sandbag, rather than using the bipod? Though admittedly the fact it is bang-on for wind makes me wonder whether my bounce-related theory has any relevance at all...

 

[markyw]

Have you checked the action screws too? If they are loose can give unpredictable results.
2" high at 100yds is pretty much the same at 200yds according to the calc I use with a standard 90gr bullet and 2700fps. 2" high at 100yds is approx. 30yd 1st zero and 240yd second zero.

Regards

Mark

 

[si_b1979]

What you're seeing with your .243 shooting 2" high at 100 yards and then 6" high at 200 yards is a classic case of bullet trajectory physics — and it's likely down to one or both of the following setup factors.

1. Scope height over bore:
If your scope is mounted significantly higher than the bore (say, 1.75" or more), the barrel has to be angled upward relative to the line of sight to intersect the scope’s axis at your zero point. This means the bullet starts below the line of sight, climbs to meet it at the zero range, continues to climb at 100 yards (where you’ve zeroed 2" high), and continues rising beyond that — hence the 6" high impact at 200 yards. The steeper the angle between bore and scope, the more pronounced this climb will be.

2. Scope mount cant (rear mount higher than front):
If your rear scope ring or base is higher than the front — intentionally or due to a misalignment — it introduces additional cant to the scope. This setup is often used for long-range shooting to preserve elevation adjustment, but at shorter ranges it causes the barrel to be angled even more steeply upward relative to the scope. That exaggerated angle means the bullet continues to climb well past your initial zero.

3. Ballistic characteristics of the .243:
The .243 Winchester is a high-velocity, flat-shooting round. When zeroed to hit high at 100 yards, it’s still in its rising phase of trajectory at 200 yards. Depending on your load (bullet weight, muzzle velocity), the bullet may not reach its apex until somewhere between 250–300 yards. So if you’re zeroing for longer distances, this kind of rise is expected. However, 6" seems excessive to me, so would suspect one of the first two issues.

 

[buckfever]

Have you checked the action screws too? If they are loose can give unpredictable results.
2" high at 100yds is pretty much the same at 200yds according to the calc I use with a standard 90gr bullet and 2700fps. 2" high at 100yds is approx. 30yd 1st zero and 240yd second zero.

Regards

Mark

Everything's tight. With the 90gr bullet iam about 4 inches high at 200 witch will probably give me a zero about 270 a would think? Will get back out tonight and set at a range iam happy with and take it from there. Just never had this before but as other comment says could be the scope height

 

[hendrix's rifle]

What you're seeing with your .243 shooting 2" high at 100 yards and then 6" high at 200 yards is a classic case of bullet trajectory physics — and it's likely down to one or both of the following setup factors.

1. Scope height over bore:
If your scope is mounted significantly higher than the bore (say, 1.75" or more), the barrel has to be angled upward relative to the line of sight to intersect the scope’s axis at your zero point. This means the bullet starts below the line of sight, climbs to meet it at the zero range, continues to climb at 100 yards (where you’ve zeroed 2" high), and continues rising beyond that — hence the 6" high impact at 200 yards. The steeper the angle between bore and scope, the more pronounced this climb will be.

2. Scope mount cant (rear mount higher than front):
If your rear scope ring or base is higher than the front — intentionally or due to a misalignment — it introduces additional cant to the scope. This setup is often used for long-range shooting to preserve elevation adjustment, but at shorter ranges it causes the barrel to be angled even more steeply upward relative to the scope. That exaggerated angle means the bullet continues to climb well past your initial zero.

3. Ballistic characteristics of the .243:
The .243 Winchester is a high-velocity, flat-shooting round. When zeroed to hit high at 100 yards, it’s still in its rising phase of trajectory at 200 yards. Depending on your load (bullet weight, muzzle velocity), the bullet may not reach its apex until somewhere between 250–300 yards. So if you’re zeroing for longer distances, this kind of rise is expected. However, 6" seems excessive to me, so would suspect one of the first two issues.

Can you just clarify this - you're saying the bullet rises or is that just how I'm reading it?

 

[buckfever]

What you're seeing with your .243 shooting 2" high at 100 yards and then 6" high at 200 yards is a classic case of bullet trajectory physics — and it's likely down to one or both of the following setup factors.

1. Scope height over bore:
If your scope is mounted significantly higher than the bore (say, 1.75" or more), the barrel has to be angled upward relative to the line of sight to intersect the scope’s axis at your zero point. This means the bullet starts below the line of sight, climbs to meet it at the zero range, continues to climb at 100 yards (where you’ve zeroed 2" high), and continues rising beyond that — hence the 6" high impact at 200 yards. The steeper the angle between bore and scope, the more pronounced this climb will be.

2. Scope mount cant (rear mount higher than front):
If your rear scope ring or base is higher than the front — intentionally or due to a misalignment — it introduces additional cant to the scope. This setup is often used for long-range shooting to preserve elevation adjustment, but at shorter ranges it causes the barrel to be angled even more steeply upward relative to the scope. That exaggerated angle means the bullet continues to climb well past your initial zero.

3. Ballistic characteristics of the .243:
The .243 Winchester is a high-velocity, flat-shooting round. When zeroed to hit high at 100 yards, it’s still in its rising phase of trajectory at 200 yards. Depending on your load (bullet weight, muzzle velocity), the bullet may not reach its apex until somewhere between 250–300 yards. So if you’re zeroing for longer distances, this kind of rise is expected. However, 6" seems excessive to me, so would suspect one of the first two issues.

Thanks for reply as you say think it could be to do with scope height. Might look into other mounts or just find a range iam happy with and set at that

 

[Kevgun]

To accurately work out whats going on you need the Bullet speed bc rating in G1 or G7 and the height above the boreline then you can work out the best MPBR , as a guess, I'd say zero it dead on at about 80 yards and see what it does.

 

[moeggesit]

2” high zero at 100yds is very high. As described by si_b1979 above, scope mounting plays a major part, it should be mounted as low as possible, otherwise you end up with slingshot trajectory over sight path. You should try to keep deviation from sight path below 1” as far as possible, stalking range is typically 80-150 yds despite frequent claims of glory. Therefore zero at 100-120 and you will shoot nearly point of aim at all distances.

 

[Smellydog]

2” high zero at 100yds is very high. As described by si_b1979 above, scope mounting plays a major part, it should be mounted as low as possible, otherwise you end up with slingshot trajectory over sight path. You should try to keep deviation from sight path below 1” as far as possible, stalking range is typically 80-150 yds despite frequent claims of glory. Therefore zero at 100-120 and you will shoot nearly point of aim at all distances.

This is wrong.
With higher mounts the first cross over of the falling bullet is further out and also the second. With lower mounts the mid range differential will be great that's all.
A scope is seeing a view below the falling bullet giving the impression the bullet has risen. It hasn't, it falling immediately on leaving the barrel at a non linear rate variable by velocity changes during time of flight and the interaction of the constant gravity. High angled shots from the horizontal can however change the outcome of the constant gravity on the bullet.

 

[si_b1979]

Can you just clarify this - you're saying the bullet rises or is that just how I'm reading it?

Sorry if that wasn't clear. I've taken this picture off the internet, which should hopefully show what I mean.

 

[hendrix's rifle]

Sorry if that wasn't clear. I've taken this picture off the internet, which should hopefully show what I mean.

View attachment 435680

It was just the way I was reading it, cheers slow morning for me

 

[Stalker62]

Just love the oxymoron in the header...

 

[ahenry34]

It seems to me that the condition you are describing has to do with the point of aim and not the ammunition

I know a lot of tikkas are direct mount and the rings clamp the receiver instead of a rail

In any cause it is normal to have 20moa built into the rings or rail

In which case the rear of the scope should be higher relative to the action than the front.

If your have 20moa rings ensure the rings are not swapped back to front

 

[jcampbellsmith]

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

Try again and shoot your rifle at 50 yds first. Get it dead on at 50 yds and then check it out at longer ranges.

Regards

JCS

 

[buckfever]

Just love the oxymoron in the header...

Like a red flag to a bull

 

[buckfever]

It seems to me that the condition you are describing has to do with the point of aim and not the ammunition

I know a lot of tikkas are direct mount and the rings clamp the receiver instead of a rail

In any cause it is normal to have 20moa built into the rings or rail

In which case the rear of the scope should be higher relative to the action than the front.

If your have 20moa rings ensure the rings are not swapped back to front

Took the scope and mount off my 223 and straight onto the 243. The 223 rail sits higher than the 243 rail. Might have something to do with it?