Muzzle Velocity of aircraft weapons

[Anaxogoras]

When I look up muzzle velocities for the aircraft weapons we have in AHII, I get varying results.  Sometimes the answer is within a certain range, and sometimes the answer is different than what is listed by another source.  Ultimately, that doesn't really matter to me.  What I want to know is what the muzzle velocities are in the game.  It doesn't have to be perfect, but something approximate would be fine.

Are these figures correct?

German:
MG17        855m/s
MGFF/M    585m/s
MG131      750m/s
MG151/20  705-805m/s  depended on ammunition type, where are we in AHII?
MK108      540m/s

British/American:
Browning .30cal:  854m/s
Browning .50cal   887m/s
Hispano Mk II      880m/s
Hispano MK V      840m/s
Vickers S            991m/s

Italian:
Breda 7.7    730m/s
Breda 12.7  760m/s

Russian:
Berezin Ub 12.7mm    850m/s
Shvak 20mm            770m/s
Berezin B-20            770m/s
NS37                      880m/s

Japanese:
Type 97 7.7mm        724m/s
Type 99 mk2 20mm   625m/s
Ho-103 12.7mm        780m/s
Ho-5 20mm             750m/s

[moot]

Pumpkin gun's missing..

[Charge]

MGFF/M    585m/s

AFAIK with Mine round the velocity was roughly 700m/s, however the AP velocity was still the same as without the /M suffix i.e. 500-600m/s. Since the Mine round was the essential part of MGFF/M I'd think the average MV should represent the typical load-out. Was it AP-HE-MG-MG? If it was, then the average should be 600m/s and something.

-C+

[Angus]

Vickers S? What is that?

[Lusche]

Vickers S? What is that?

40mm on Hurricane D

[Murdr]

Some info previously posted.

As a matter of interest, official German velocity loss and time of flight figures for their aircraft ammo were as follows:

Loading/notes    MV m/s    V/300m    V loss  secs/300m   V/600m  V loss  secs/600m

7.92 mm AP 10g   810   538   33%   0.453   348   57%   1.159
13mm HEI 34g   750   501   33%   0.49   337   55%   1.22
15mm HEI 57.5g   960   743   23%   0.357   583   39%   0.816
20mm HEI 92g 1   695   432   38%   0.551   281   60%   1.428
20mm HET 117g 2   720   552   23%   0.477   422   41%   1.101
30mm HEI 330g 3   500   370   26%   0.696   264   47%   1.660
30mm HEI 330g 4   500   429   14%   0.649   370   26%   1.403
30mm AP 355g 5   960   862   10%   0.33   776   19%   0.697

Notes:
1 –   M-Geschoss fired from an MG-FFM.
2 –   fired from an MG 151/20.
3 –   M-Geschoss Ausf.A fired from an MK 108.
4 –   M-Geschoss Ausf.C fired from an MK 108.
5 –   Hartkernmunition fired from a MK 101 or MK 103.

German information from a different source document indicated that HS 404 HET shells slowed from 880 to 675 m/s at 300 m and about 500 m/s at 600 m, reductions of 23 % and 43 % respectively.