The web's most comprehensive user-interactive handloading database! Find the loading data created by handloaders, for handloaders, post your pet loads, or access and develop your own online loading database with our LoadNotes personal handloading database software. This feature, unique in its concept and intuitive in it's data presentation is fast to access, superbly organized and comprehensive in scope.Our online forums for questions and answers on many shooting and outdoor related topics. A dynamic, active, and well-informed resource for your enjoyment and interaction. Our most used resource on this website! Come share the experience with us!
» Advanced

Go Back   Shooters Forum > Rimfires > Rimfire Rifles
Register FAQ Members List Donate Calendar Search Today's Posts Mark Forums Read



Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1  
Old 09-03-2009, 06:24 AM
Beartooth Regular
 
Join Date: Aug 2009
Location: VA
Posts: 27
Sighting in a .22 LR


Registered Users do not see the above ad.


Question guys....

If I zero my .22LR with scope at 100 yards, what effect will that have on my shot placement at 50 yards? Will I be shooting high? low? Should I zero in to shoot high at 100 yards? How much?

Thanks guys!
Reply With Quote
  #2  
Old 09-03-2009, 07:52 AM
unclenick's Avatar
Super Moderator
 
Join Date: Jan 2005
Location: Hilliard, Ohio
Posts: 10,587
There are so many .22 LR rounds out there from subsonic velocity to high speed, from lightweight 20 grain bullets to 60 grain bullets, that it is necessary to know what ammunition you are shooting? Usually the manufacturer will have some trajectory information for a specific cartridge.

For example, Winchester Super-X publishes their high velocity 40 grain bullet is about 3.6" high at mid-range when sighted at 100 yards and fired from a rifle. Then you also have to allow that your sights are above the bore axis by some amount and allow that the bullet has to climb by that additional amount to hit the target. So, figure a gun using that ammunition, sighted at 100 yards using a scoped rifle with the scope centerline 1.5" above the bore axis, will probably impact something on the order of 4 1/3" high on a 50 yard target, give or take, due to your gun's barrel length or other individual characteristics. That is just the 3.6" 50 yard trajectory climb, from which the bullet falls back to the center of the target at 100 yards, plus about half the moa needed to add 1.5" of scope bore at the 100 yard range.

All bullets start falling in gravity from the moment they leave the bore. For that reason they always have to be aimed above a straight line from the bore in order to hit a target that isn't placed directly over the muzzle, but is some distance further away. The only fooler in that comes from the sights being above the bore line. The bullet will climb up to meet that sight line at some distance from the muzzle that is called the point blank range. This varies with what range you are sighted in at and how flat shooting the bullet trajectory is?

For the above reason, many hunters and plinkers develop sighting strategies that minimize the change over distance. For the regular high velocity .22's, a common one is to sight 1.5" to 2" high at 50 yards, then know the bullet will fall about 1.5" to 2" below line of sight at about 90 yards and not much more at 100 yards. Check it with your gun. That sighting approach lets you aim at the center of a tin can at any distance from close up to 100 yards and still hit on it somewhere. If you hunt squirrels and rabbits you want to learn to estimate your range to them from their size on your sights so you can adjust your hold above or below the heart or head by the right amount. It's not a bad plan, if your club range allows short firing (ours has target holder holes in the ground at 25,50,75, and 100 yards) to put up a set of rabbit or squirrel silhouette targets at each of those ranges, and practice seeing what the size looks like in the scope or across an iron front sight blade and practice hitting them with the estimated hold adjustment for the range.
__________________
Nick
__________________________
Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Instructor
NRA Patron Member
"First contemplation of the problems of Interior Ballistics gives the impression that they should yield rather easily to relatively simple methods of analysis. Further study shows the subject to be of almost unbelievable complexity." Homer Powley

Last edited by unclenick; 09-03-2009 at 08:01 AM.
Reply With Quote
  #3  
Old 09-03-2009, 08:03 AM
Beartooth Regular
 
Join Date: Aug 2009
Location: VA
Posts: 27
Wow

Thanks so much for that wealth of information! I think I get it. So next time I'm at the range I'll put targets out at 25, 50, 75, and 100.

Thanks alot!
Reply With Quote
  #4  
Old 09-03-2009, 04:13 PM
Beartooth Regular
 
Join Date: Jul 2005
Location: rural Iowa
Posts: 4,077
For target work, you can "zero" it where ever you choose with your favorite ammunition. Then learn what it will do at other distances.

For small game critters and varmits, you must factor in the limited "horsepower" of the cartridge.

I find about 55 yards to be usefull as a zero range in that regard. Enough "poop" to take a squirrel out to 75 or so, and still close to POA at 25 yards. Anything beyond that requires "hold over" and windage adjustment.

I prefer the sub-sonic ammo when availible.

Cheezywan
Reply With Quote
  #5  
Old 09-04-2009, 02:37 AM
Beartooth Regular
 
Join Date: Oct 2007
Location: Maine
Posts: 421
I usually use a 25 yard target with any new 22 and try a bunch of different ammo until I find the one that groups best in that gun. Then I sight it in at 50 yards using that ammo. I rarely have an opportunity to shoot at anything beyond 50 yards anyway. Then I know that I can sight dead on at any range out to about 60 yards and hit it.
I do have a rifle in 17HMR that I did sight at 100 yards, and a 14" Contender barrel in HM2 on the way that I will sight at 100 yards. Both of those have a very flat trajectory out to about 100 yards anyway, especially when compared to a 22.
Also, I only use open and peep sights on my 22s. Most of them are levers, and I just can't stand the looks of a scope on a lever gun, but that's just me. YMMV.
Reply With Quote
  #6  
Old 09-04-2009, 11:35 AM
Beartooth Regular
 
Join Date: Feb 2008
Posts: 162
Jack O and Weaver...

Long time ago an article by Jack O'Connor was in each Weaver scope box. The main cartridge was .22 Long rifle. No hyper velocity rounds. I learned this.

You have three lines to think about. #1). is the "line of bore." You look through the barrel. Light travels straight line. Etc. But, you cannot load and fire while looking thru the barrel. SO reference points are put on the outside of the barrel, called "sights." #2). You look thru the sights to point the barrel. #3). is the challange. This is "bullet path." "Trajectory." It curves. Once the bullet leaves the barrel it starts to fall. You lower the rear of the barrel so the "line of bore" is pointed above the target and the bullet will "fall" into the point you wish to hit. AND SO the bullet, while falling, will cross the "line of sights" and rise above the line of sight on the way to falling into the target.

The part that sticks with me: Hang a target at 48 inches. Survey 100 yards. Place the rifle at 48 inches. Sight thru the bore. Oh yes, .22 Long rifle. Load and fire. You will find the bullet struck 12 inches below the point of aim thru the bore. Move back to 125 yards and the bullet will fall 36 inches.

Now if you sight a rimfire to hit "point of aim" (with the sights) at 12.5 yards, the bullet will be rising above the line of sight while falling below line of bore. Line of bore pointed at point above intended point of impact. Bullet will strike point of aim at 12.5 yards. At 50 yards it will be 2 1/2 inches high approx. At 77 yards it will again strike point of aim. At 100 yards it will be about 3 inches low. About 9 inches low at 125 yards.

There are tables in the back of reloading manuals for many cartridges. Hornady for example. Lower velocity rounds, say .30/30, are calculated for 250 yards. High velocity, say .270, are calculated for 500 yards. As said, no two guns are exactly the same and testing is a good idea. Luck.
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
.22 WMR vs .22 LR Savage Hunter Rimfire Rifles 43 04-21-2014 08:14 PM
The .22 Hornet Revisited! James Gates Handloading Procedures/Practices 57 01-09-2014 02:08 PM
Kimber .22 conversion kit MpK Handguns 6 07-01-2009 08:30 PM
Advice on picking 1 gun from 400 gdeckler General Discussion 17 11-30-2008 02:40 PM
Bushy Sighting Problems? AVIVIII Ex-Military Rifles & Cartridges 4 10-17-2008 11:32 AM


All times are GMT -8. The time now is 01:22 PM.

< Contact Us - Shooters Forum - Archive >

 
 

All Content & Design Copyright © 1999-2002 Beartooth Bullets, All Rights Reserved
View Privacy Policy | Contact Webmaster | Legal Information
Website Design & Development By Exbabylon Internet Solutions
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0 PL2