Calculation Results

Calculation Results

The alloy density value of calculations is determined by the alloy selected in the Main Form Alloy Type Drop-Down List

however, the value may be edited to more closely represent the alloy density of the selected design.

If the displayed dimensions of the bullet are correct but the calculated weight is substantially different than actual weight, then divide the actual weight by the calculated weight - multiply the resulting value times the value displayed in the Alloy Density field and then edit the value in that field with the result of the multiplication.

A ballistic coefficient for the bullet is estimated from Ogive, Meplate and Length configuration values. However. if the bullet meplate diameter is over 50% of the body diameter, the estimate is usually not very accurate. A closer estimate that uses the Sectional Density of the bullet as a ballistic coefficient value is usually a better estimate.

Un-checking the "Calculate + 50% meplate B.C." box will set the Coefficient of Form factor to 1 and the ballistic coefficient will then be estimated as equal the Sectional Density of the bullet.