Print How to Design a Jacketed Bullet

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How to Design a Jacketed Bullet;

0. Click the "New" button to open a blank design record.
1. Select a Mold or Manufacturer name from the drop-down box.
2. Enter a cryptic description of the design.
     A. Select the Jacketed radio button.
3. Enter a Bullet Number or ID.
4. Enter the firearm Barrel Groove Diameter.
5. Enter the actual bullet diameter in the "As-Cast" field.
6. Initially, select a Tangent ogive from the "Nose type" .
7. Initially, select a round meplate type from the drop-down.
8. Select a "Square" crimp from the drop-down.
     A. Using the Spin-edit arrows, select a value equal to the desired knurled groove length multiplied by 1000.
9. Initially, select the Plain Base option from the Base Band drop-down.
10. Select "Jacketed" from the Alloy Type drop-down box and upon exiting a Weight/Length calculation window will appear.
      A. Enter a desired weight to calculate an initial length or enter a desired length to calculate an initial weight.
      B. An initial bullet length and in-case length will be calculated and entered into fields 11 and 12.
11. Do not edit the length until after the initial evaluation of the design.
12. Do not edit the calculated in-case length until after the initial evaluation of the design. When the in-Case field is exited, all remaining data fields will be filled with initial values.

Click the "Bullet Specs" button and evaluate the initial design.

Crimp Band Detail:
1. Edit the crimp groove dimeter to the desired value. approximately 0.010" less than bullet diameter.
2. For an initial plain base design, edit the crimp Band length to equal ( in-case length - crimp length).
3. Edit the Side< value to approximately 70 degrees.

Top Band Detail
For jacketed bullet designs, initially edit the length to 0.0 and the lower and top diameters to equal that of the desired diameter forward of the knurled groove.

Bore Ride Detail:
1. Edit values to the desired nose diameters forward of the knurled groove.
2. Editing the Bore Ride length will, in turn, change the ogive length and the ogive radius values.

Nose Detail
1. edit the meplate diameter and exit the field. The ogive radius will be recalculated . To further alter the Tangent Ogive Radius value, the bore ride length value will need to be edited.
To change the ogive radius value with out changing the ogive length, return to the Nose Type field and select the "Secant Ogive" option.
An Edit Secant Ogive button will become visible. Click to open the Secant Ogive editor.

Base Band Length: ( editing band style and boat tail style )
1. Plain Base
    Edit the length to 0.0. Edit the Diameter to As cast Diameter

2. Bevel Base
    Select Bevel Base option from Base Band drop-down.
    Edit the Band L. field to the length of the bevel.
    Edit Shank L. field to the length of the bevel.
    Edit Base Bevel Dia to the end diameter of the bevel.
    In the Crimp Band Panel, decrease the Band L. value by the shank Length
    In the Band & Grease Groove Panel,
      Set the Groove/Band ratio to 1.
      Set the Body Bands value to 0.
      Set the Groove bottom dia. value to the As-Cast diameter.
      Set the Groove side-angle value to 89.5.

3. More on boat tail and rebated boat tail designs.

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