About the soviet 20x99mm new 840m/s MV....

[the_emperor]

with the recent update the MV was increased to 840m/s and the projectile weight adjusted to the correct later 96g (the weight of the most common HE, HE-T and API projectiles).

The 840m/s MV was justified by the manual kindly provided by @=FB=VikS

 

which give us the MV up to 840m/s for the 1540mm barrel version, unfortunately not specifying the projectile weight, which can reach the 840m/s.

 

Does any one have another manual that show 840m/s?

As I think that should be reconsidered for the 96g projectile, based on the following sources:

 

a) T-60 20mm Shvak manual giving 800m/s for the 1538mm barrel and the 96g API and HE-I projectile

 

 

b) this La-7 manual that gives us a MV range of 750-790m/s for the  1588mm barrel length

 

matching the german intelligence report (770m/s for 96g at 1250mm -> 790m/s for the 1588mm barrel seem reasonable)

 

c) 1953 manual for soviet ammunition (specific qeight, propellant and barrel: 96g; 18g; 1250mm)

 

so thus far I have seen a maximum of 800m/s for the 96g projectile from the the  1540 barrel.

Does any one have manual specifying the 840m/s with projectile weight?

 

Cheers

Edited May 27, 2024 by the_emperor

[Avimimus]

There is quite a bit of discussion (might have some useful information), as well as some dev responses, in this thread:

 

[the_emperor]

Yep, I know. that was me starting the discussion there😁