More information wanted on experimental Swiss 13,5x96 round


#1

Dear forum,

I recently acquired an experimental Swiss 13.5x96R21.4 round dated 1934. Does anybody have information on the weapon/experiment?

Regards,

Hoeksel

ps. I will add images later if I figure out how


#2

Hoeksel, email me the picture and i will upload it here.


#3

hello
i see your picture on bocn forum
very close to the 13.2x96 hotckiss but light different shoulder


#4

Hoeksel, or anyone else
What are these numbers after the R -> “21.4”, and how did they now become part of the cartridge name / designation?


#5

Here is the BOCN link, hope it’s OK:
bocn.co.uk/vbforum/threads/9 … post263412


#6

[quote=“PetedeCoux”]Hoeksel, or anyone else
What are these numbers after the R -> “21.4”, and how did they now become part of the cartridge name / designation?[/quote]

Hi, the R is for rim and the number the rim diameter in “mm”.


#7

[quote=“ammogun”]hello
i see your picture on bocn forum
very close to the 13.2x96 hotckiss but light different shoulder[/quote]

The rim diameter is significantly larger as well.


#8

hello
it sure that is a pre ww2 experimental for heavy mg or antitank rifle
i say that is very close to the 13.2x96 hotckiss but i see that your round has minor difference


#9

And here are the photo’s:



#10

I did get information on different existing Swiss 13.5 mm rounds:

13.5x88.5R22 dated 1929
13.5x96R21.5 dated 1933
13.5x100R22 dated 1928

No further information so far.


#11

Great round!

It looks close to this drawing. Note that these were all called 13.2mm.

There were a great many experiments at Altdorf in the mid-1920’s to 1930’s to develop a heavy machine gun round.

Can you remove the projectile? It has quite a sharp and distinctive ogive. I have some drawings of these projectiles if you can provide some dimensions and weight.

Paul


#12

Hi Paul, thanks for the drawing!

The projectile is loose from the case so here your request:

weight case: 56 g
weight projectile: 49 g
length projectile: 58.9 mm

Regards,

Hoeksel


#13

What is that marking on the primer?


#14

38, I think the manufacturing year of the primer. The same you see on early Swiss 20 mm Oerlikon cases.


#15

Hi Hoeksel,

Can you post a picture of the base end of the projectile? Is it a tracer projectile? From the drawings I have, to get that weight and length it has to be a tracer projectile. Example:

Paul


#16

[quote=“PaulSmith”]Hi Hoeksel,

Can you post a picture of the base end of the projectile? Is it a tracer projectile? From the drawings I have, to get that weight and length it has to be a tracer projectile. Example:

Paul[/quote]

You are correct! It has a tracer, I will post images (or try to…).

http://s722.photobucket.com/user/Hoekseltje/story