It doesn´t need to be explained that the tests were made to ensure a minimum penetration performance under service conditions not too far off the officially rated performance. The composite 75mm Pzgr39 was even tested exactly on the officially rated performance, which by the standarts of 1942, must have been considered an example of exceptionally tight quality controll, resulting in most of the 75mm Pzgr 39 projectiles encountered in mass production having a performance in excess of their officially rated paper performance.

Original german service acceptance requirements for mass produced, service AP ammunition (PzGr.).

Projectiles from EVERY heat were selected for ballistic and physical tests. WaPrüf would select randomly from a lot or based upon suspicious quality after examination of the presented lot at the manufacturer, they would select six projectiles for tests from each lot. One lot beeing typically one heat. If for some reason more than one heat was combined for a single projectile lot, then WaPrüf would select a proportionally larger number of test specimen to ensure quality.

disclaimer: german obliquity figures are defined with 90° = perpendicular. In order not to mix it up with other services, I have transformed all german original data into the more common standart 0° = perpendicular instead.

Source: BAMA RH 8-1319 (primary source)

*up to 1942*

Plate thickness: 45mm RHA

tensile strength: 120kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 540m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 50mm RHA at 30° and 540m/s for the Pzgr Gg.

Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 750m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 100mm RHA at 30° and 750m/s for the Pzgr39 (!).

Plate thickness: 60mm RHA

tensile strength: 120kg/mm² +- 5kg/mm²

velocity: 620m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Plate thickness: 55mm RHA

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 600m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 72mm RHA at 30° and 600m/s for the Pzgr Gg. Attempts to raise the acceptance conditions to 75mm Pzgr39 levels failed because while the 100mm plate could be holed reliably at 750m/s by the 8.8cm Pzgr, the damage to the lower projectile body rendered the AP blind.

**5cm monobloc Pzgr Gg.**Plate thickness: 45mm RHA

tensile strength: 120kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 540m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 50mm RHA at 30° and 540m/s for the Pzgr Gg.

**7,5cm composite Pzgr39**Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 750m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 100mm RHA at 30° and 750m/s for the Pzgr39 (!).

**7,62cm monobloc Pzgr39 rot**Plate thickness: 60mm RHA

tensile strength: 120kg/mm² +- 5kg/mm²

velocity: 620m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

**8,8cm monobloc Pzgr Gg**Plate thickness: 55mm RHA

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 600m/s

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 72mm RHA at 30° and 600m/s for the Pzgr Gg. Attempts to raise the acceptance conditions to 75mm Pzgr39 levels failed because while the 100mm plate could be holed reliably at 750m/s by the 8.8cm Pzgr, the damage to the lower projectile body rendered the AP blind.

*1942 to 1944*

Plate thickness: 55mm RHA

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 740m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: Rc60 at nose (outside and centre), less than Rc57 and the lot will not be passed to ballistic test and directly rejected.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 62mm RHA @ 30° and 740m/s for 5cm Pzgr 39.

Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 750m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal: Rc61-62.5 at nose (outside) and Rc 60-61 (centre, no less than Rc59), less than RC 56 anywhere at nose and the lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 100mm RHA at 30° and 750m/s for the Pzgr39 (!).

Plate thickness: 80mm RHA (1944 amended to 100mm RHA)

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 650m/s (1944 amended to 740m/s)

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal: Rc60-61.5 at nose (outside) and RC 60 (centre, no less than Rc59), less than RC56 anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 85mm RHA at 30° and 650m/s for the Pzgr39 rot.

Plate thickness: 140mm RHA

tensile strength: 90kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 830m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal Rc59 at nose (outside and Rc56 in centre), less than RC55 encountered anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 140mm RHA at 30° and 825m/s for the Pzgr39 & Pzgr 39/43.

Plate thickness: 160mm RHA (1944 amended to 180mm RHA)

tensile strength: 90kg/mm² +- 5kg/mm² (1944 amended to 80-90kg/mm²)

obliquity: 30°

velocity: 900m/s (1944 amended to 950m/s)

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal Rc59 at nose (outside and Rc56 in centre), less than RC55 encountered anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 165mm RHA at 30° and 900m/s and 180mm RHA at 940m/s for the Pzgr 39/43.

Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 650m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: Rc59 at nose (outside and Rc55 in centre), less than Rc54 encountered anywhere at nose and the lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 115mm RHA at 30° and 650m/s for the Pzgr rot. Attempts to raise the acceptance conditions to 160mm @ 800m/s failed because the projectile was not always remaining intact.**5cm composite Pzgr39**Plate thickness: 55mm RHA

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 740m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: Rc60 at nose (outside and centre), less than Rc57 and the lot will not be passed to ballistic test and directly rejected.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 62mm RHA @ 30° and 740m/s for 5cm Pzgr 39.

**7,5cm composite Pzgr39 and monobloc Pzgr 39/42**Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 750m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal: Rc61-62.5 at nose (outside) and Rc 60-61 (centre, no less than Rc59), less than RC 56 anywhere at nose and the lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 100mm RHA at 30° and 750m/s for the Pzgr39 (!).

**7,62cm monobloc Pzgr39 rot**Plate thickness: 80mm RHA (1944 amended to 100mm RHA)

tensile strength: 110kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 650m/s (1944 amended to 740m/s)

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal: Rc60-61.5 at nose (outside) and RC 60 (centre, no less than Rc59), less than RC56 anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 85mm RHA at 30° and 650m/s for the Pzgr39 rot.

**8,8cm monobloc Pzgr 39-I**Plate thickness: 140mm RHA

tensile strength: 90kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 830m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal Rc59 at nose (outside and Rc56 in centre), less than RC55 encountered anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 140mm RHA at 30° and 825m/s for the Pzgr39 & Pzgr 39/43.

**8,8cm monobloc Pzgr 39/43**Plate thickness: 160mm RHA (1944 amended to 180mm RHA)

tensile strength: 90kg/mm² +- 5kg/mm² (1944 amended to 80-90kg/mm²)

obliquity: 30°

velocity: 900m/s (1944 amended to 950m/s)

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: ideal Rc59 at nose (outside and Rc56 in centre), less than RC55 encountered anywhere at nose and lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 165mm RHA at 30° and 900m/s and 180mm RHA at 940m/s for the Pzgr 39/43.

**10cm monobloc Pzgr rot**Plate thickness: 100mm RHA

tensile strength: 100kg/mm² +- 5kg/mm²

obliquity: 30°

velocity: 650m/s

demands on the projectile:

impact toughness at base: lengthwise: >8 mkg/mm² but no less than 6 mkg/mm², perpendicular: no less than 4mkg/mm²

Rc hardness: Rc59 at nose (outside and Rc55 in centre), less than Rc54 encountered anywhere at nose and the lot will not be passed to ballistic test.

2 shots. If both penetrate intact, lot passes(A). If one fails, another projectile from the lot is retested and lot only passed if that projectile penetrates intact(b). Else, lot is rejected.

= (A) 2 out of 2 or (B) 2 out of 3 successes in intact bursting condition (projectile damage does not reach cavity or fuze adaptor)

Notice: Officially rated performance was 115mm RHA at 30° and 650m/s for the Pzgr rot. Attempts to raise the acceptance conditions to 160mm @ 800m/s failed because the projectile was not always remaining intact.