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\ Federal, Winchester, and Remington Ballistics /

Technical Information
JBM - Ballistics - Calculations

NOTE: I will not guarantee these calculations for ANY purpose. Remember to use common sense at all times and to check loading with current manufacturer's data.

There are now two different trajectory calculations. A "basic" one with few options and the original one with a few new options. Most notably, the ability to move the zero point.

Ballistic Coefficients (Time)
Calculates the ballistic coefficient for a near velocity, time of flight, atmospheric conditions and drag function.

Ballistic Coefficients (Velocity)
Calculates the ballistic coefficient for near and far velocities, atmospheric conditions and drag function.

Bullet Drag and Twist
Calculates the bullet CD, and CD components, BC required twist and stability for input twist. Inputs required are the bullet measurements including nose length, total length, boattail length, meplat diameter, base diameter, caliber, weight, atmospheric conditions and drag function. This algorithm is based on the McDrag work done by Robert McCoy. See bibliography

Maximum Bullet Range
Calculates the maximum range and the elevation required to achieve this range. Also calculated is the absolute maximum height for the same bullet fired "straight up".

Point Blank Range
Calculates maximum point blank range and maximum point blank range zero from ballistic coefficient, muzzle velocity, vital zone radius and atmospheric conditions.

Sunrise/Sunset
Calculates Sunrise and Sunset time and length of the day for a given day of the year, time zone, latitude and longitude.

Trajectories
from bullet BC and firearm info. Inputs include muzzle velocity, sight heights, chronograph distance, ballistic coefficient, drag function, line of sight and cant angles and atmospheric conditions. Output options include variable ranges and choice of units for windage and drop (inches, MOA, and mils). Calculations are performed assuming the bullet is a point mass. Elevation and azimuth are iteratively corrected to ensure a correct zero.

Trajectories -- Basic
Not really "basic", but simpler. Many people don't use all the terms in the trajectory calculation page listed above, so this page invisibly sets defaults for variables like drag function (G1), sight offset, etc. The calculation is done with the same program as the trajectory page above.

All of these functions and more are available at http://www.eskimo.com/~jbm/ballistics/calculations.html

Remington Shoot! Ballistics Caculator
Generate powerful ballistics reports and graphs, compare two different Remington factory loads and more with Remington Shoot!, an interactive ballistics software program from Pinsoft Software.

Centerfire Rifle Ballistics Tables

BALLISTICS COMPARISON CHARTS

Now you can compare centerfire rifle ballistics!
Choose up to three calibers to view their ballistic information and compare them to see which best fits your needs. If you want to compare different loads in the same caliber, simply select that caliber in the seperate drop down menus.

ON-LINE TABLES

Centerfire Ballistics, Pistol & Revolver Ballistics, Rimfire Ballistics, Shotshell Ballistics, and Black Powder Ballistics

Ballistics Table Information

ENERGY CALCULATOR

Estimate the energy of your favorite cartridge. If you are unsure of which bullet weight and/or velocity to submit, use the information from our on-line ballistics tables above.

Remington Country:
http://www.remington.com/ammo/ballistics/ballistics.htm

The Sportsman's Guide

Ballistics for Shotshell Ammunition, Centerfire Caliber, Pistol/Revolver Caliber, Rimfire Caliber, Remington Ammunition, Winchester Ammunition, and Federal Ammunition.

GuideOutdoors Ballistics Charts:
http://www.sportsmansguide.com/resource/ballistics.asp


RIFLE SCOPE SIX SHOT ZERO LESSON PLAN

Do you become frustrated when you have to use a box of ammo when sighting in your rifle?

If so, try the SIX SHOT ZERO next time you sight-in.

The first consideration is to follow the:

"Ten Commandments for Sighting In a Rifle"

  1. Select a quality scope and mounting system. Your gunsmith will help you make this choice.
  2. Mount the scope properly. One of the most common causes of inaccuracy in hunting rifles is that the scope is not mounted correctly.
  3. Check the action screws. Another reason that rifles don't shoot tight shot groups is that the action screws work loose. You should use Hollow Ground screwdrivers for these adjustments. Also check all scope mounting bolts.
  4. Sight in from a steady rest. To properly Sight In a rife, you must remove as much human error as possible. This is done by using a good solid bench rest. Be sure that the rifle's stock and not the barrel sets on the rest. Those of you who use a sandbag should have a friend adjust the scope while you hold the rifle steady.
  5. Use good visibility targets: You can't hit if you can't see it. Be sure to use the correct "Bull" for Zero yardage.
  6. Bore sight your rifle if you can, as it will save you a lot of time in getting your shots on the paper.
  7. Sight In with the hunting load that you intend to use.
  8. Sight In with a cool barrel. Remember, a rifle barrel as it heats up it will change the bullet's point of impact.
  9. Use the "SIX SHOT ZERO". Assuming you have properly completed the "Ten Commandments for Sighting in a Rifle Scope" Here is a simple Sight In procedure that is quick and easy to do. Since it only requires SIX shots it will save you lots of ammunition:

    Fire three shots at a target 100 yards down range With the weapon unloaded and the action open go to the target and mark the holes with a black marker. Return to the shooting bench and aim the unloaded rifle at the target again as you did for the three shots.

    With rifle held steady and looking through the scope, move the vertical crosshair to the center of the three-shot group.

    Next move the horizontal crosshair until it's in the center of the three-shot group.

    (Remember it is essential that the rifle be held very securely during these adjustments.)

    And again those of you who use a sandbag should have a friend adjust the scope while you hold the rifle steady.

    Now load your rifle and fire three shots at the bulls-eye, it should be dead-on at 100 yards.

    I CAUTION YOU NOT TO BECOME CONFUSED BY THE NEXT COMMENT:

    If you want your rifle shooting 1 inch high at 100 yards so that it will be dead-on at a longer range, simply position the two crosshairs at 1 inch below the center of the first three-shot group.

    With some practice, you will find that this Six shot sighting-in method will save you time, ammunition and punishment from recoil and muzzle blast.

  10. Use hearing protection and shooting glasses and ALWAYS OBSERVE ALL Country Pond Fish and Game Club Rules! CLICK HERE TO READ THEM!