Responses in line.

E

On Sat, Jul 11, 2020 at 4:19 PM <xxxxxx@gmail.com> wrote:
Tom,

On Sat, Jul 11, 2020 at 11:10 AM Thomas RUX <xxxxxx@comcast.net> wrote:
Hi kaladorn,

On 07/10/2020 5:21 PM xxxxxx@gmail.com wrote:


HEAP penetration has the following modifiers: TL 7 - 8 count down 3 rolls, TL 9 - 10 count down 5 rolls, TL 11 - 12 count down 6 rolls, TL 13 count down 5 rolls,

The values go up steadily until TL13 then drop.... is that correct? You might want to check.
Darn them web gremlins I know I typed rows but I now see rolls.

FWIW, I saw the drop at TL 13 (now corrected in your latest) but I saw 'rows' because I knew we were looking at a table. Funny how your brain inserts what it knows should be there!

I saw "rows" as well!

No, I screwed up another entry from the books this time the Tech Level modifiers. Try number two:
Tech Level 7-8 down 3
Tech Level 9-10 down 5
Tech Level 11-12 down 6
Tech Level 13+ down 7
Medium Velocity Gun up 2
High Velocity Gun up 3
Tech Level 6 Hyper Velocity Gun up 4
Tech Level 7+ Hyper Velocity Gun no mod

I understand this set of result as consistent, but I still have a confusion (with what the rules say maybe more than what you wrote):

So, the table is for TL-6 mortars/low vel guns.
So when I get increasing TLs, I count 'down' the table (towards higher Pen values). That makes sense.
Then we see modifiers for gun type (Medium up 2, Heavy up 3, Hyper vel up 4 at TL 6, then nothing at TL7

So...
1) If counting down takes you to the higher penetrations (as you'd expect with TL increases), why does a medium gun count, then heavy, then a hypervel count UP farther each gradation? Shouldn't they count DOWN as well? Does penetration decline by medium, heavy, hypervel? Why?

2) If the rules of physics are what they are for TL6, why does the TL 7 one get no changes?

You end up with (based on gun type):
Medium Gun (any TL) - count up (to smaller penetrations?)
"Medium Velocity"
Heavy Gun (any TL) - count up more (to smaller still penetrations?)
"High Velocity"
Hyper (TL 6) - count up even more (to even smaller penetrations?)
Then suddenly Hyper (TL 7) - do nothing

So the first question is why we go up table as gun type advances to med, large, and TL6 Hyper?

Presumably because higher velocities require more structure in the shell to avoid it collapsing under the acceleration. HEAT/HEAP ammunition is largely explosive, after all.

The M4 w/ 76mm gun suffered from significantly reduced HE content in its HE shells because of its higher velocity. The Pather did as well, but to a lesser extent.
 
And the count up goes on in TL 7+ Medium and Heavy guns BUT suddenly no mods to TL7 Hyper?
No idea. If TL 7 allows hypervelocity guns to ignore the effects on shell structure, you would think that it would apply to lower velocity guns as well.