New Posts New Posts RSS Feed - 40 yard shooting range
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Check GunBroker.com for SWFA's No Reserve and No Minimum bid firearm auctions.

40 yard shooting range

 Post Reply Post Reply   Topic Search Topic Search  Topic Options Topic Options
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2011 at 11:11
pctyler View Drop Down
Optics GrassHopper
Optics GrassHopper
Avatar

Joined: June/28/2011
Location: florida
Status: Offline
Points: 3
I got a 40 yard shooting range, Thompson Venture in 7mm-08(130gr.) and Leupold 3-9X40mm..........if I zero this set up dead on at 40 yards, where will it hit at 100 yards?  where is a good resource online for this info? thanks for the help...
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2011 at 11:17
Bigdaddy0381 View Drop Down
Optics God
Optics God
Avatar
Georgia peach

Joined: February/27/2007
Location: Georgia
Status: Offline
Points: 12825
you will hit high @100, if i'm not mistaken. You should be about 1 inch low at 40 to have 100 or close to 100 zero.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2011 at 11:25
300S&W View Drop Down
Optics God
Optics God
Avatar

Joined: January/27/2008
Location: Burlington,WV
Status: Offline
Points: 10592

 

 WELCOME to OT,pc.

 You'll need more info than you provided but this is a pretty simple ballistics program.  I figured at 3000fps with a BC of .40 sighted in at 40yds and got +.99" at 100yds.

    http://www.handloads.com/calc/

 
  I got -.4 at 40yds when dead on at 100yds using my info.  BUT you'll need your specifics to know for sure.


Edited by 300S&W - August/26/2011 at 11:31
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2011 at 11:52
jonoMT View Drop Down
Optics Master Extraordinaire
Optics Master Extraordinaire
Avatar

Joined: November/13/2008
Location: Montana
Status: Offline
Points: 4622
You can use a ballistics calculator like JBM (http://www.jbmballistics.com/cgi-bin/jbmtraj_drift-5.1.cgi) to play around with different zeros...although be warned that you need to get the right data entered in the first place. But Bigdaddy is in the ballpark on what is likely the drop at 40 vs. 100 yards. When you fire, the bullet's trajectory related to the sight starts out low (the distance of the sight height* over the center of the barrel), arcs upwards (slightly, given the overall distance of flight) and then drops down. At whatever range it crosses the center of the sight is the zero.

To end up with a 100-yard zero using a 40 yard range, you'll have to make sure that your shots are hitting 1/2 to 1 inch lower than your point of aim. Even then, it will be an approximation. Theoretically, I could zero my .308 for 200 yards by shooting a zero @ 35 yards. But I wouldn't depend on it in the field.

*The best way I know of to measure the sight height is if you have a dial caliper, measure the width of the barrel right below the scope bell. Add that to the width of the scope bell, then divide that by 2 and add the distance between the scope bell and the top of the barrel.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: August/26/2011 at 15:33
pctyler View Drop Down
Optics GrassHopper
Optics GrassHopper
Avatar

Joined: June/28/2011
Location: florida
Status: Offline
Points: 3
Thanks for the info!
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Similar Threads: "40 yard shooting range"
Subject Author Forum Replies Last Post
Church Steel Shoot (200 yards-1125 yards) Ernie Bishop Shooting 0
Barrett ExRings dual MOA 15/40 or 30/40 Pin-Lock® 338LAPUASLAP Rings and bases 11
Leupold 12-40 HD spotter vs.old 12-40 x 60 DFMc Spotting Scopes 0
Spotting scope, 100 to 300 yard use on the range w squared Spotting Scopes 22
VX-3 6.5-20*40 VRS MK4 4.5-14*40 Ant264 Rifle Scopes 2
Long range shooting advice dw0229 Rifle Scopes 22
Flat Field Ranging - 450 yards? RAG Laser Rangefinders 2
Accurately ranging deer beyond 600 yards? huff143 Laser Rangefinders 23
binocs for shooting range and general use wskungfuclub Binoculars 5
Best Scout Scope for Long Range Shooting Hypnogator Rifle Scopes 8


This page was generated in 0.391 seconds.