en:doku:cartridgedesigner

Cartridge-Designer

The Cartridge Designer is a powerful tool for designing and editing caliber specifications. This includes the definition of the cartridge and also that of the cartridge chamber, exactly as in the simple editing window of a caliber in the caliber database.

In the Cartridge Designer, however, you additionally have the real-time updating representation of a technical drawing of the specifications.

It depends from where you call this tool.

The behavior is displayed in the upper right corner of the window.

  • If you select the Cartridge Designer from the toolbar or menu, you only edit the caliber specification stored in your currently active grtload file.
  • If you call the Cartridge Designer from the Caliber Database, then you edit the respective entry from the caliber database.

If you want to create a completely new Cartridge/Caliber specification, it is recommended, that due to the abundance of the necessary input parameters, you select a similar already existing specification as a basis and create a copy of it.

To do so, open the caliber database,

  • select the desired entry, right-click and select “New with copy” to create a copy:
  • The simple cartridge edit shows up:
  • Save it right away and it appears as user created file:
  • select “Edit in Cartridge Designer” again by right-clicking on the newly created entry.:

Editing the individual Symbols/Dimensions is done in three tabs on the right side of the window.

The meaning of the individual symbols such as “L1” or “G1” can be found in the table at the bottom under “Meaning of the Symbols”.

  • General - Edit the general data.
  • Cartridge - Edit the cartridge/case.
  • Chamber - Edit the cartridge chamber.

By editing the respective values of the symbols, you will change the dimensions of the drawing in real time.

If errors are detected, the corresponding fields are highlighted. Hold the mouse over an error line to get a description of the error at the top of the information bar.

You can click on a dimension directly in the drawing. The corresponding value in the list on the right list on the right and turned over automatically.

Lengths
L1 Length from case bottom to diameter P2
L2 Length from bottom of sleeve to diameter H1 of sleeve neck
L3 Total length of the sleeve
L4 Length from bottom of sleeve to diameter G2
L5 Length from bottom of sleeve to diameter F
L6 Total length of cartridge
Case Head
R Rim thickness
R1 Rim diameter
R3 Belt diameter
E Case Base Thickness
E1 Diameter of milled groove
emin Width of the groove
δ Half angle of the milled groove (between E1 and P1)
f Height of the phasing of the edge
β Angle of the phasing of the edge
Powder Chamber
P1 Diameter at the end of the rim, before milling or at a distance E from the bottom of the sleeve
P2 Diameter of sleeve at distance L1
Shoulder
α Shoulder angle
S Length to top of shoulder
r1min Radius of transition at end of P2
r2 Radius of the transition between the shoulder and the neck of the sleeve
Case Neck
H1 Diameter at case neck at distance L2
H2 Diameter at case mouth at distance L3
Bullet
G1 Bullet diameter at case mouth
G2 Bullet diameter at distance L4
F Bullet diameter at distance L5
Pressures (Energy)
Pmax Mean maximum allowable pressure
PK Maximum allowable single statistical pressure = Pmax + 15%
PE Mean impingement pressure = Pmax + 25%
EE Minimum impingement energy (joules)
M Position of the borehole in the case for pressure sensor position of proof barrels

Barrel
F Lands diameter of the barrel
Z Grooves diameter of the barrel
Lengths
L1 Length of chamber at diameter P2
L2 Length of chamber at diameter H1
L3 Length of chamber at diameter H2
Breech
R Distance from breech face to the backward edge of barrel
R1 Diameter of the breech
R2 Depth of the breech
r Junction radius at the chamber mouth
R3 Diameter before the breech for belted cartridges
Powder Chamber
E Distance from butt plate to entrance of chamber
P1 Diameter at entrance of cartridge chamber or at distance E
P2 Diameter at beginning of transition cone at distance L1
Junction Cone
α Angle of junction cone
S Length to intersection of junction cone
r1max Radius at end of diameter P2
r2 Transition radius at junction at collar
Collar
H1 Diameter at beginning of collar at distance L2
H2 Diameter at distance L3
Transition
G1 Diameter at the beginning of the transition
G Distance between H2 and F
α1 Junction angle between H2 and G1
h Distance between H2 and G1 (angle: α1)
s Distance between H2 and beginning of transition at diameter G1
i Half angle of transition slope
Grooves
b Width of grooves
N Number of grooves
u Twist length
Q Effective barrel cross section

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  • en/doku/cartridgedesigner.txt
  • Last modified: 2021/05/30 03:34
  • (external edit)