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  #1  
Old 04-05-2013, 07:35 AM
Bronze Member
 
Join Date: Feb 2012
Location: South Louisiana
Posts: 30
Need Help

I have 2 long range rifles but will talk about one today. I am having problems with my ballistic solution I cannot get it to match up. I have shot my data and know what MOA is needed to hit zero and several distances but cannot get the balistic programs to match up with this data and I have tried a few programs. I will list the data I have if someone can please tell me what I am doing wrong, I am desperate. I am faily new at this.
308 WIN
168 Grain Berger Classic Hunter
BC G-1 .496 G7 .254
Muzzle Velocity 2553 FPS
Sight above bore 2"
Sighted in at 200 yards
Elevation 100'
Temp 65 degree's
Humidity 65%
400 5.5 MOA
500 8.75 MOA
600 14 MOA
700 20 MOA
800 27 MOA
Please help me!!!
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  #2  
Old 04-05-2013, 07:57 AM
Gold Member
 
Join Date: Aug 2008
Location: east central fl. /n.c. pa.
Posts: 652
Re: Need Help

shoot at some targets at various distances. make note of the (actual) ammount of elevation added in order to hit the target.
then tweek the velocity numbers in the program to match what you actually got by shooting. thats your chart. not the one gotten by velocity from a chronagraph and a computer program.
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  #3  
Old 04-05-2013, 08:25 AM
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Join Date: Jul 2007
Posts: 951
Re: Need Help

ballistic programs are only "closeology" , your actual drops need to be verified by shooting YOUR weapon.
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  #4  
Old 04-05-2013, 09:49 AM
Gold Member
 
Join Date: Feb 2013
Location: Central MT
Posts: 745
Re: Need Help

Quote:
Originally Posted by lougonl View Post
I have 2 long range rifles but will talk about one today. I am having problems with my ballistic solution I cannot get it to match up. I have shot my data and know what MOA is needed to hit zero and several distances but cannot get the balistic programs to match up with this data and I have tried a few programs. I will list the data I have if someone can please tell me what I am doing wrong, I am desperate. I am faily new at this.
308 WIN
168 Grain Berger Classic Hunter
BC G-1 .496 G7 .254
Muzzle Velocity 2553 FPS
Sight above bore 2"
Sighted in at 200 yards
Elevation 100'
Temp 65 degree's
Humidity 65%
400 5.5 MOA
500 8.75 MOA
600 14 MOA
700 20 MOA
800 27 MOA
Please help me!!!
Welcome to long range shooting Try this, adjust your velocity to match your 800 yard 27 MOA correction and post how far off your program is to matching your 700, 600, 500 and 400 MOAs. For example, after adjusting your velocity to match 27MOA elevation correction post what your computer states for a 700 elevation correction such as 19.75MOA and so on. This may help out with a response. Also post if you are correcting for atmospheric changes from your zero atmosphere conditions to your field conditions.

Again, welcome to long range shooting.
__________________
Shoot CONFIDENT, Shoot SMART, Shoot STRAIGHT
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  #5  
Old 04-05-2013, 10:44 AM
Bronze Member
 
Join Date: Feb 2012
Location: South Louisiana
Posts: 30
Re: Need Help

Yes you are correct welcome to long range shooting it is making me crazy. I am matching my atmospheric conditions with the conditions I shot the data at.
I adjusted the velocity to shoot 27 MOA at 800 Yards I will list what happen to the rest of the table.
400 6.75 MOA
500 10.75 MOA
600 15.50 MOA
700 20.75 MOA
800 27.00 MOA
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  #6  
Old 04-05-2013, 12:57 PM
Platinum Member
 
Join Date: Dec 2011
Location: Vandergrift PA
Posts: 1,241
Re: Need Help

Remember when that bullet is fired into the chamber it changes the B.C. I almost always find that I have to add FPS to my program before it matches my actual numbers. Once I have a 100 yard zero and a load I am happy with I chrono and build the balistics chart for what the conditions are then take it out and shoot distance. I use the corrected numbers from the real shooting to make the finial chart (and that chart changes with the temp.)
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  #7  
Old 04-05-2013, 01:28 PM
Gold Member
 
Join Date: Feb 2013
Location: Central MT
Posts: 745
Re: Need Help

Quote:
Originally Posted by lougonl View Post
Yes you are correct welcome to long range shooting it is making me crazy. I am matching my atmospheric conditions with the conditions I shot the data at.
I adjusted the velocity to shoot 27 MOA at 800 Yards I will list what happen to the rest of the table.
400 6.75 MOA
500 10.75 MOA
600 15.50 MOA
700 20.75 MOA
800 27.00 MOA

What is your adjusted velocity for 800?

Also if you could do the same for 700 and adjusted velocity please.
__________________
Shoot CONFIDENT, Shoot SMART, Shoot STRAIGHT
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