Range Report Newbie ammo question

[flemgunner]

Ok so I have a nifty box of ammo sitting on my desk and am curios about something. The ballistic "scale" on the box only goes up to 500 yds. How do you guys figure out drop at ranges out to 1k?
I understand its only a guide and all but like I said, Im new to all this

 

[flemgunner]

Re: Newbie ammo question

Never mind I figured it out. DL an app input the data and poof

 

[gstaylorg]

Re: Newbie ammo question

This is a very useful site:

http://www.jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi

Input the pertinent data (load, MV, atmospheric conditions, etc.), and generate your drop chart. Results are pretty good as long as the input data is solid.

 

[Greg Langelius *]

Re: Newbie ammo question

Bravo for figuring that out. It shows dedication and ingenuity.

Before you trust the computations completely, I'd suggest confirming the results at some of the distances.

The box ballistic chart makes general assumptions that influence the data's validity. Confirmation will determine whether any adjustments or compensations might need doing for your particular rifle. Quite often some variance between comps and practical experience will appear.

You might also want to consider that factory loads may or may not remain supersonic out to 1000yd. Transsonic and subsonic portions of a trajectory can behave out of character compared to the supersonic portion.

Just keep your eyes and mind open, and you'll do fine.

Greg

 

[marduk185]

Re: Newbie ammo question

id ignore anything the manufacturer prints on the box. they inflate velocities. check yer load thru a chrono from your rifle and then jbm that.

 

[longguntoter]

Re: Newbie ammo question

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: flemgunner</div><div class="ubbcode-body">Ok so I have a nifty box of ammo sitting on my desk and am curios about something. The ballistic "scale" on the box only goes up to 500 yds. How do you guys figure out drop at ranges out to 1k?
I understand its only a guide and all but like I said, Im new to all this </div></div>Look up the facts on some ballistics software. Some ammunition companies have this information on their websites.