sighting in a 260 at 25m where should i put it for minute of deer sholder out to 200

i know this isnt ideal however i have my new 260 here and there is a range day tomorrow and im iching to shoot it however its been so wet getting the wheel chair to the 100m range maynot be possable if i am stuck at 25m where should i zero the gun so i can be pretty confident (on a sholder size target) out to 200m if i get a chance to hunt before i can get to zero it proper
im sure i saw somewere with a 308 bang on @25 is 1inch high @100 and pretty close @200 im geussing with 260 being flatter shooting id have to sight slightly low

is anyone able to give me an idea
cheers

Just pulling some numbers from my arse, if using a typical hunting bullet at 140gr and 2600fps with a 25y zero you'll get roughly the following trajectory

http://i964.photobucket.com/albums/a...psc124e3d5.jpg
The only issue is its real easy to be out by a little at this range and not notice it on the target, and that could add up to a big deal at 200y, so it's pretty crude.

@kimjon so that means id have to sight 3 iches low at 25m for 100m zero? heres a few numbers a 130gn bullet (bc .485) at 2700 (book vol but better than nothing)

What session are you going to? If it's afternoon you're going to, I'll run your targets on the 100m for you

thanks @Tommy no im going down in about 1/2 hour to be at sign in at 8:30 thanks for the offer but its just getting down to the 100 shooting mound weather looks shit so might just use the 25 and stay dry lol

No NOT 3 inches low at 25!

0.6 inch low at 25y to be on at 100y

This is approximate of course, I used a scope height above bore of 1.5inch but will be close enough for a shoulder to 200.

Zero it ibn the bulls eye. At 25 metres you could be a bit off horizontally which might only show at 100

Yes, dead on at 25m at the moment until you can test it at a more useful range.

got out to 100 anyway got it sighted well enough will spend a bit more time on it in the future