Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.

 
  
Reply
 
Thread Tools Display Modes
Old 04-21-2012, 15:13   #1
raidhell27
Member
 
Join Date: Dec 2010
Posts: 22
New to Rifles - Help

Sorry if this posts twice....I tried posting once, and for some reason I can't see it.

I've been trying to zero in my rifle (Ruger 308) shooting 150 grain FMJ. I'm shooting a group at 100 yards around 2" high which is where I beleive the bullet should be at that range. However, at 200 yards I am consitantly 4" high. I would expected at two hundred yards to be zeroed.

I have two thoughts:

1- I am at an elevation 5,200 feet above sea level. Is this causing the bullet to have less drop than what I am expecting?

2- The targets at the range climb up a gradual slope at 100 yard intervals. The 200 yard target is higher than where I am shooting. Would this effect the point of impact by 4"?

Any help would be appreciated.

Thanks
raidhell27 is offline   Reply With Quote
Old 04-23-2012, 12:36   #2
Zak Smith
3Gunner
 
Zak Smith's Avatar
 
Join Date: Aug 1999
Location: Fort Collins, CO, USA
Posts: 692
Use a ballistics calculator with the info from your rifle, including sight over bore distance, to get a trajectory. Set it up for a 200 yard zero. See how high the ballistics calculator says you should then be at 100 yards. Either zero that much high at 100, or zero dead on at 200, or you can also use the "first zero" (the first crossing point) which will be around 40-50 yards.

If the actual bullet behavior does not match the computer, you put something in wrong or have a rifle or technique problem.
__________________

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
Zak Smith is offline   Reply With Quote

 
  
Reply

Thread Tools
Display Modes

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 -6. The time now is 12:37.




Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 1,014
262 Members
752 Guests

Most users ever online: 2,672
Aug 11, 2014 at 2:31