Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > Sighting Question?

Reply
 
LinkBack Thread Tools Display Modes
Old 02-22-2012, 02:50 AM   #1
Feedback Score: 0 reviews
 
Flat4sti's Avatar
 
Join Date: Apr 2010
Location: Ft. Lauderdale
Posts: 246
Liked 2 Times on 2 Posts

Default Sighting Question?

I think that i have my new ar sighted in ok 25yrd. what i have a question is that if i am dead on at 25yrd (which I am ),i will be good again at 300...Correct?
Now my local range only goes to 100yrds. How high should I be at 100. I am very novice and these are the things I have questions about. I think that my poi is 5 inches high give or take from my poa...plus I gotta factor that it was my first time out. So i guess i am asking what should I expect the difference should be?



__________________
Flat4sti is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 02-22-2012, 02:53 AM   #2
Feedback Score: 0 reviews
 
ShagNasty1001's Avatar
 
Join Date: Oct 2011
Posts: 1,526
Liked 460 Times on 267 Posts
Likes Given: 22

Default

Quote:
Originally Posted by Flat4sti
I think that i have my new ar sighted in ok 25yrd. what i have a question is that if i am dead on at 25yrd (which I am ),i will be good again at 300...Correct?
Now my local range only goes to 100yrds. How high should I be at 100. I am very novice and these are the things I have questions about. I think that my poi is 5 inches high give or take from my poa...plus I gotta factor that it was my first time out. So i guess i am asking what should I expect the difference should be?
I have my AR sighted in at 200 yards and at 100 it's about 1.5 inches high. I sighted my 308 in at about 35 yards since that's what my indoor range went to before I found the outdoor one I now attend and it was able to kill a deer at around 325 yards this year while aiming dead on. Then again, that's a different bullet with different coefficients


__________________
ShagNasty1001 is offline  
 
Reply With Quote
Old 02-22-2012, 04:19 AM   #3
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,511
Liked 972 Times on 683 Posts
Likes Given: 972

Default

Maybe 6" high at 100yd depending on barrel and ammo.

__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 02-22-2012, 12:06 PM   #4
Feedback Score: 0 reviews
 
treehugger49's Avatar
 
Join Date: Apr 2009
Location: Newnan,Georgia
Posts: 421
Liked 42 Times on 36 Posts
Likes Given: 2

Default

Don't know all the variables of your barrel, sight height, etc., but here are the ballistics from RSI Shooting Lab for a Federal XM-193 55 grain, .250 BC, shot w/ a 3065 MV (adjusted down from published MV for 16" bbl) sight height of 2.6". I had to play with the numbers to get the near zero of 25 yards, and here's what the program came up with:

Range Path


0 -2.6

25 0

100 6.2

150 8.8

200 10.1

250 9.7

300 7.5

350 3.1

375 0

400 -3.8

Sorry for the poor format - don't know how to import the results, and can't seem to get the proper spacing, but you get the idea.....

__________________

XD-40 service, XD-9sc, member GeorgiaCarry.Org, National Rifle Association, Gun Owners of America, North American Hunting Club, Rocky Mountain Elk Foundation


Last edited by treehugger49; 02-22-2012 at 12:11 PM.
treehugger49 is offline  
 
Reply With Quote
Old 02-23-2012, 01:43 AM   #5
Feedback Score: 0 reviews
 
tsully85's Avatar
 
Join Date: Oct 2011
Posts: 55
Liked 3 Times on 3 Posts

Default

Look up "enhanced battle zero". Then all you'll need is a 1/16" allen wrench and a target 50 yards away. Basically you'll be changing the lowest setting for your sights from 300 to 200 yards. After you modify your sights just zero it at 50 yards and it'll be dead on at 200 also. Then you wont have to hold so low at 100. That drove me nuts at first too.

__________________
tsully85 is offline  
 
Reply With Quote
Old 02-23-2012, 01:52 AM   #6
Feedback Score: 0 reviews
 
Flat4sti's Avatar
 
Join Date: Apr 2010
Location: Ft. Lauderdale
Posts: 246
Liked 2 Times on 2 Posts

Default

Thanks guys...so i wasn't way off.



__________________
Flat4sti is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
sighting in question KRAGGY69 General Rifle Discussion 1 08-06-2010 12:26 PM
SKS sighting mcramer General Rifle Discussion 1 05-23-2010 07:57 AM
AR 15 100 yds sighting in... supergus Range Report 15 01-02-2010 09:56 AM
Sighting In mark2734 Auto & Semi-Auto Discussion 1 08-25-2008 12:56 PM
Sighting a 30-30 Bosco General Rifle Discussion 4 10-12-2007 06:48 PM