You haven't proved anything Glen, Zip Nada Nothing! Late Panther glacis plates were full of flaws, plus the Panther in question was one which had already been knocked out burned out in action beforehand, so when fired upon by the 122mm D-25T the armour had already been weakened considerably.
For D25T/APHE（BR-471), there are TWO different peroformance
1) penetrate panther glacis @650m
Further, after the first encounters between the JS-2 and German heavy tanks, it turned out that the sharp-nosed 122 mm APHE round - the BR-471 - could only penetrate the frontal armour of a Panther up to 600-700 metres
2) penetrate panther glacis @2500m+
However, in the summer of 1944, the problem of the poor AP performance disappeared. The performance of the D-25T gun of the JS-2 against the German tanks improved dramatically. The reports from the front described cases where the BR-471 APHE round 122 mm projectile fired from 2500 metres ricocheted off the front armour of a Panther leaving huge holes and cracks in it.
The D-25 122 mm tank gun manufactured at the factory #9. Its ballistic characteristics are identical to those of the following guns: the A-19 122 mm, the D-2 122 mm (factory #9) and the S-4 (Central Artillery Design Bureau), giving it a muzzle velocity of 780-790 m/s with a 25 kg projectile. This gun reliably penetrates the Panther's frontal armor at 2500 metres, and that is less than its maximum range.
The difference of penetration between 650m and 2500m for D25T is 35mm-40mm! What does this mean? AS we all known, the Panther D's amor is the best, and G version's is the worst.
Therefore, for BR-471 shell, pen. Panther D @650m, and pen. Panther G @2500m+. I'll bet that.
BTW, Panther galcis, 80mm/55 or 85mm/55, must be
stronger than a 150mm vertical amor(same quality as panther 80mm plates). However, D25T BR471@650 penetration is below 150mm russian vertical plates! That's why russian target amor is better than panther glacis in spite of which version(D,A,G etc)! With regard to russian tank amor,it's another issue, I'll talk in future.
Plus American testing proved the gun (KwK43) to be effective against the Panther's glacis out past 1,000 yards.
Which version is the Panther? I'll bet it is Panther G, for Panther D, kwk43's apcbc can only pen. @650m.
Now here's my question: How come the 88mm KwK43 managed to completely penetrate both sides of a Henschel Tiger Ausf.B turret, which equates to 285mm of armour penetrated during Soviet tests at 400m, with its Std. APCBC round while the 100mm D-10T couldn't even leave a dent in the rear turret when hitting a huge weak spot on the turret's front, the gunsight ??
LOL
At first, D10T can penetrate Henschel Tiger Ausf.B turret @1000m!
5. Armor-piercing projectiles from the BS-3 (100 mm) and A-19 (122 mm) gun completely penetrated the "Tiger-B" tank's front turret plate at ranges of 1000-1500 metres.
The Russian Battlefield - Was the Tiger really "King?"
0m 500m
1000m 1500m 2000m
D10T *** 155mm
135mm 115mm 100mm
D25T *** 152mm 142mm
133mm 122mm
D10T@1000m=D25T@1500=around
134mm vertival russian target plates=180mm KT's front turrent!
Kingtiger's amor quality=Panther G, K=
1950 whlie russian target plates
K=2400.
Kingtiger's front turrent:180*(1950/2400)^1.43= 180*74.3%=
134mm
Kingtiger's rear turrent: 80*74.3%=
59mm Do not notice me the small obliquity of turrent amor ,apcbc shell can handle this small angle.
Oh my god, you don't know how to calculate multi amor at all! Two amor(134mm+59mm) is NOT equal to 193mm! I swear.
let total stopping power is x, there is
x^1.43=134^1.43+59^1.43 (De Marre's
approximately calculation)
x=163mm
Penetration of 163mm vertical .....kwk43's apcbc can achieve that within 500 meters.
Also how come there are numerous accounts of IS-2's being knocked at ranges past 4km by Nashorn, Tiger Ausf.B and other AT personnel ???
Js2's side amor ? rear amor?
Also remember that the 88mm KwK43 L/71 demonstrated superior penetration performance in British trials as compared to the German trials, which matches perfectly well with the fact that German criteria was slightly more strict. And also remember the trials conducted at the Aberdeen proving grounds USA, all demonstrating the huge advantage in penetration performance of the 88mm KwK43/PaK43 L/71 over any Allied AT gun. Or should I take it that you, Glen, believe all these to be "cheat scores" as-well ??
British and American use 200mm+ plates, so the penetration table is cheat! For example, kwk43/17pdr can indeed pen. 260mm vertical plates(bad quality compared with 120mm plates) in spite of made in american/british/rassia, however, they can NOT 120mm/60 which is equivalent to 260mm vertical(good quality as 120mm)
Fact is that the 88mm KwK43 L/71's penetration figures are NOT overblown, they were results achieved against very high quality 250 - 265 BHN plates at close range and very high quality 300 + BHN plates at long range laid back 30 degree's from vertical. And std. criteria was 2/3'rds of the projectiles fired had to completely penetrate the plate.
Against high quality 300 + BHN plates laid back 30 degree's from the vertical the 88mm KwK43 L/71 demonstrated a penetration performance of 127mm at 2.5km. Thats more than than the 88mm KwK36 L/56 achieved at 100m.
Germany
definition of penetration:
completely penetrate
probability of penetration：
50%
target plate：
type：RHA
thickness/hardness：
5-15mm/BHN 435-465
16-30mm/BHN 338-382
31-50mm/BHN 323-368
51-80mm/BHN 309-338
81-120mm/BHN 279-309
121-150mm/BHN 235-265
151-275mm/BHN206-235
It's probably germany 84mm(kwk36 @2000m pen.) amor has better quality than German 132mm(kwk43 @2000m pen.).
The Soviet figures were on the other hand achieved against poor quality brittle plates of BHN's varying from 250 to 350. Std. criteria varied as-well from 2/3'rds to 75% of the projectiles fired to partially penetrate the plate.
Don't forget that Roosevelt and Churchill shipped a lot of amor steel to russian.
It is said that almost 50% of russian amor steel is from allied. Do you believe russian wasted those strategic material?