need help with sighting in my rifle
11-27-2008, 12:22 PM
#1
Fork Horn
Thread Starter
Join Date: Oct 2008
Posts: 105
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]
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]
11-28-2008, 02:14 PM
#4
Nontypical Buck
Join Date: Nov 2006
Location: central Ky
Posts: 2,867
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.
11-28-2008, 09:00 PM
#6
Nontypical Buck
Join Date: Feb 2003
Location: Coralville, IA. USA
Posts: 3,802
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
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
