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need help with sighting in my rifle

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need help with sighting in my rifle

Old 11-27-2008, 12:22 PM
  #1  
Fork Horn
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Default need help with sighting in my rifle

17 HMR

I'm not a pro at this. I have access to only 25 yds (indoor sucks)... I want to be able to shoot my target accurately at 100yds mean it should be zero at that distance.. How much higher do i shoot from the center? Is this how i would go about doing it?

1. zero dead center @ 25 yds
2. adjust elevation up so it hits XXX" above center[/align]3. i have to find out the drop distance for my bullet too?

????

anyone??? thanks![/align]
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Old 11-27-2008, 08:07 PM
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Default RE: need help with sighting in my rifle

THE 17 HMR IS A PRETTY FLAT SHOOTING BULLET SHOULD NOT BE ANY DROP AT 100 YDS
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Old 11-27-2008, 08:54 PM
  #3  
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Default RE: need help with sighting in my rifle

You have to shoot at 100 yards, plain and simple.

Sighting in at 25 yards only means you will be within a few inches at 100 yards.
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Old 11-28-2008, 02:14 PM
  #4  
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Default RE: need help with sighting in my rifle

While it's ALWAYS best to shoot at the range you want to see where it'll impact,it is possible to shoot at 25 yards then know about where your bullets will hit. To do this you have to figure in scope height above bore,and trajectory. Usually when I start at 25 yards,before going back to 100 yards with your cartridge,I'll adjust scope to poi at about 1 inch low at 25,then move to 100 and it SHOULD be pretty doggone close,BUT like he said,the only way you'll know for SURE is to shoot from 100 yards.
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Old 11-28-2008, 03:32 PM
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Default RE: need help with sighting in my rifle

ORIGINAL: calebsdad1

THE 17 HMR IS A PRETTY FLAT SHOOTING BULLET SHOULD NOT BE ANY DROP AT 100 YDS
Huh? The bullet starts to drop the second it leaves the barrel, I dont care what caliber.
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Old 11-28-2008, 09:00 PM
  #6  
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Default RE: need help with sighting in my rifle

I'd sight in 1" low at 25 yards. Where it hits at 100 will depend on how high the centerline of the scope is above the bore and the actual performance of you rifle. Ammo manufacturers often state a muzzle velocity on the package, but in my experience it's rarely right (I've seen as much as +50/-150 fps) so ballistics charts aren't a very good way to sight in a rifle.

Sighting in 1" low at 25 is only a starting point, and if you want to zero at 100, you're going to need to find a 100 yard range. -1" @ 25 yards is only good to (almost always) get you on paper at 100. Also remember that any error in your zero at 25 is magnified 4 times at 100 yards. If you're off by 1/2" at 25, you'll be off by about 2" at 100. Your zero will be much more precise once you can actually shoot at 100.

Good luck,

Mike

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