The Firing Line Forums

Go Back   The Firing Line Forums > The North Corral > Competition Shooting

Closed Thread
 
Thread Tools
Old February 20, 2012, 07:40 PM   #1
MyCleverSN
Junior Member
 
Join Date: February 20, 2012
Posts: 4
Zeroing a rifle question

Okay so I guess you can say I'm quite new to guns. I've grown up liking them as a little boy and joined the Army national guard(11b) 2 years ago and went to OSUT at Ft Benning. That was the first time I ever shot a gun..

The only rifle I have ever zeroed is the standard issue M4 carbine in OSUT and drills when we go to the range(Which is practically never, it's bs, infantry unit that never shoot... how bout that). We zero I believe at 25M for a 300M range. This is where my question comes in for the M4 as well as a sniper rifle that I am building. How does zeroing at 25M make the weapon zeroed effectively at 300M? Does this mean if I zero at a further distance than 25M then the weapon is zeroed for further targets? Or is there a set limit on where to zero and that weapon is zeroed with your sights/optics and you adjust appropriately to wind direction, height, wind speed ect...?

I'm building a cheap sniper rifle for no more then $300. If I zero this rifle at a indoor shooting range to my "scope" at 25 YARDS, how far is it zeroed to?

THANKS
I'm building the sniper rifle out of a Mosin Nagant 9130.


EDIT

I forgot to say HI! =). I'm getting more and more interested in guns and thinking about going to gunsmith schooling. I was researching random things about guns and stumbled across this website through google multiple times for similar questions. Looks like I can learn some things from other members here.. Thanks in advance

Last edited by MyCleverSN; February 20, 2012 at 07:44 PM. Reason: Add extra words
MyCleverSN is offline  
Old February 21, 2012, 08:40 PM   #2
4EVERM-14
Senior Member
 
Join Date: November 12, 2006
Location: Pennsy
Posts: 553
One reason for the 25M zero is that some military bases do not have appropriate range facilities for the full distance.
The quick answer is that the arc of the bullet passes the 25 M target on the rise of it's arc and the 300M target on the declining side of the arc. This is not a perfect situation but is enough for man size targets. It is possible to set up a rifle at 25 yards and have a high probability of hitting paper at 1000 yards. This all depends on factors including bullet weight, velocity,caliber,ETC. The best zero is shooting the actual distance. Keeping a data book on sight settings for various distances can be very helpful.
__________________
David
NRA Benefactor Member
Distinguished Rifleman #731
Presidents 100
4EVERM-14 is offline  
Old February 21, 2012, 09:57 PM   #3
kraigwy
Senior Member
 
Join Date: June 16, 2008
Location: Wyoming
Posts: 9,204
Didn't we just go through this in the Art of the Rifle forum where you ask the same question?

http://thefiringline.com/forums/show...38#post4969538
__________________
Kraig Stuart
CPT USAR Ret
USAMU Sniper School Oct '78
Distinguished Rifle Badge 1071
kraigwy is offline  
Old February 21, 2012, 10:07 PM   #4
SIGSHR
Senior Member
 
Join Date: September 13, 2005
Posts: 2,967
When I went through BCT in 1967 at Fort Dix, the 25M-or 1000 inch range-was to teach you to shoot, to get your rifle-M-14 back then-zeroed, then you went to the pop-ups. Don't think it was a matter of Army posts lacking facilities so much as it was a fairly easy way of training people, easier to call a ceasefire and check the targets. When I was in the NY National Guard we several times got people qualified on an indoor range using 22 adaptor units in our M-16s.
SIGSHR is offline  
Old February 22, 2012, 03:08 PM   #5
FM12
Senior Member
 
Join Date: February 5, 2007
Location: Monroeville, Alabama
Posts: 1,591
1000 inch range for me also, US Navy 1973. M1A, 308.
FM12 is online now  
Old February 22, 2012, 08:20 PM   #6
RamItOne
Senior Member
 
Join Date: May 24, 2011
Posts: 976
dup thread



already put up other illustrations in thread quoted by kraigwy
RamItOne is offline  
Old February 22, 2012, 09:44 PM   #7
Mike Irwin
Staff
 
Join Date: April 13, 2000
Location: Northern Virginia
Posts: 35,229
See the post in Art of the Rifle.

Welcome to TFL, MyCleaver. Please post your question in only one forum. That way the discussion isn't diluted across several threads.

Closed as a duplicate.
__________________
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza

Baby Jesus cries when the fat redneck doesn't have military-grade firepower.
Mike Irwin is offline  
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 11:20 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2013 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.07029 seconds with 9 queries