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30mm Rarden

E

earni74

Well-Known Member
Premium Member
Hi Guys
(1) Here are pics of a 30mm Rarden round belonging to a friend, the holes in the sabot leading edge is something I have not seen before, is this a practice projectile !

(2) The case and primer have no stamps, as far as I can remember these unstamped cases were used for APDS and APFSDS experimental rounds !

(3) The length of the primer tube is something I have not seen before, obviously for quicker/better ignition

(4) Finally, can anyone explain why it has the mark on the side of the case, its not a hole and can be felt on the inside, the case has been fired.


thanks in advance006.jpg007.jpg008.jpg009.jpg010.jpg011.jpg012.jpg013.jpg
 
Condition of round could be a pressure test/sample type round.the sabot looks like the style of short range projectiles,which i guess they are anyway.

Is it definitely 30mm Rarden (no headstamp, primer is different) or another 30x170(HSS/Oerlikon)?.

That round mark is also similar to the ejector mark on the side of fired 20x110rb Oerlikon cases,so possibly fired from different gun type.
 
Last edited:
kahu1 said:
Condition of round could be a pressure test/sample type round.the sabot looks like the style of short range projectiles,which i guess they are anyway.

Is it definitely 30mm Rarden (no headstamp, primer is different) or another 30x170(HSS/Oerlikon)?.

That round mark is also similar to the ejector mark on the side of fired 20x110rb Oerlikon cases,so possibly fired from different gun type.
Click to expand...

The "round mark" seen on fired 20x110RB Oerlikon cases is not an ejector mark. The Oerlikon has a "Double Loading Stop" plunger protruding into the top of the chamber which is lifted by the cartridge being chambered. As the round is fired the brass is pressed against the stop producing this distinctive mark. As the fired case leaves the chamber the stop pin can drop again. If the pin stays up the double loading stop mechanism blocks the forward motion of the bolt so that a live round cannot be rammed into a separated case left in the chamber. Because the unlocked breech of the gun allows the fired case to move back whilst the projectile is travelling up the bore the pressure swells the shoulder and mouth of the case and produces the scuffing mark extending forward from the "round mark".

gravelbelly
 
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