I get more muzzle velocity out of less powder:

**** Input data: Date: 4-Oct-2009 Time: 15:46:16

Cartridge................. = .338-06 A-Square

Projectile type........... = 8.58, 9., Möller 8,5 mm KJG S with boattail

Max.avg.pressure(Piezo A-S)= 448 MPa Shot start / init pressure = 15 MPa

Projectile weight (g)= 9.007 Groove caliber (mm)= 8.59

Length of cartridge (mm)= 84.84 Length of case (mm)= 63.35

Case capacity (cu.cm)= 4.48 Length of projectile (mm)= 30.48

Length of barrel (mm)= 560

**** Values calculated:

Seating depth (mm)= 8.99 Volume displaced (cu.cm)= 0.52

Comb.chamber volume (cu.cm)= 3.96 Projectile travel (cm)= 50.56

**** Input data:

Propellant type........... = ADI AR 2219

Charge weight...........(g)= 3.732 Load density......(g/cu.cm)= 0.942

Heat of Explosion (kJ/kg)= 4000 Ratio of spec. heats cp/cv = 1.231

Solid density (g/cu.cm)= 1.57 Weighting factor...........= 0.50

Burning rate factor Ba(1/s)= 0.67 Pro-/degressivity factor a = 0.4497

Burning limit ......... z1 = 0.5 Combust.Chamber Vb(m³)= 3.962779E-6

Factor.................. b = 1.6 X-S.Area of Bore A(m²)= 5.695E-5

Bulk density (g/cu.cm)= 0.950 Projectile mass mp(kg)= 9.007E-3

Loading ratio (%)= 99.1 Projectile travel x(m)= 5.0563E-1

**** Results calculated:

Maximum pressure ........ = 430 MPa Way of projectile at Pmax = 37.1 mm

Muzzle velocity ......Ve = 999 m/s Muzzle pressure .......Pe = 60 MPa

Project. energy at muzzle = 4493 J Fraction of powder burnt = 99.7 %

Projectile travel time from 10% Pmax to muzzle = 0.88 ms

**** Input data: Date: 4-Oct-2009 Time: 15:46:16

Cartridge................. = .338-06 A-Square

Projectile type........... = 8.58, 9., Möller 8,5 mm KJG S with boattail

Max.avg.pressure(Piezo A-S)= 448 MPa Shot start / init pressure = 15 MPa

Projectile weight (g)= 9.007 Groove caliber (mm)= 8.59

Length of cartridge (mm)= 84.84 Length of case (mm)= 63.35

Case capacity (cu.cm)= 4.48 Length of projectile (mm)= 30.48

Length of barrel (mm)= 560

**** Values calculated:

Seating depth (mm)= 8.99 Volume displaced (cu.cm)= 0.52

Comb.chamber volume (cu.cm)= 3.96 Projectile travel (cm)= 50.56

**** Input data:

Propellant type........... = ADI AR 2219

Charge weight...........(g)= 3.732 Load density......(g/cu.cm)= 0.942

Heat of Explosion (kJ/kg)= 4000 Ratio of spec. heats cp/cv = 1.231

Solid density (g/cu.cm)= 1.57 Weighting factor...........= 0.50

Burning rate factor Ba(1/s)= 0.67 Pro-/degressivity factor a = 0.4497

Burning limit ......... z1 = 0.5 Combust.Chamber Vb(m³)= 3.962779E-6

Factor.................. b = 1.6 X-S.Area of Bore A(m²)= 5.695E-5

Bulk density (g/cu.cm)= 0.950 Projectile mass mp(kg)= 9.007E-3

Loading ratio (%)= 99.1 Projectile travel x(m)= 5.0563E-1

**** Results calculated:

Maximum pressure ........ = 430 MPa Way of projectile at Pmax = 37.1 mm

Muzzle velocity ......Ve = 999 m/s Muzzle pressure .......Pe = 60 MPa

Project. energy at muzzle = 4493 J Fraction of powder burnt = 99.7 %

Projectile travel time from 10% Pmax to muzzle = 0.88 ms