Restored 105MM shell

Although the cartridge cases are different, it would be be possible to load a 105mm recoilless rifle cartridge into the 106mm recoilless rifle if not for one important feature. Look at the base of a 106mm recoilless rifle cartridge case. It has a circular groove around the primer. There is a circular protrusion around the firing pin of the rifle breech. That protrusion indexes into the groove of the case. The 105mm recoilless rifle case does not have this groove and it can't be loaded into the 106mm gun.

If not for this feature it would be possible to load a 105mm RR round into the 106mm gun. If the 105mm round could be fired in the 106mm gun; the gun would be destroyed.
 
hey potatoehead what did you use for polishing the shell I got two 120mm cases that I would like to do that too
 
Back in the mid-60's,,,

Recreating an artillery round was an approved project in wood shop class.

Our teacher had a book showing the exact dimensions of many different cartridges,,,
We had to do at least one project on the lathe and this was a fun one for us.

I wish I still had a few of the ones we made back then,,,
I know one is still gathering dust in the old VFW hall in Blanchard, OK.

Aarond
 
thallub, thanks for the heads up about the 105mm, I had not heard of it.

If not for this feature it would be possible to load a 105mm RR round into the 106mm gun. If the 105mm round could be fired in the 106mm gun; the gun would be destroyed.
Click to expand...

OK, now that you have jogged my memory about the 106mm, I don't recall the ring around the firing pin of the breech, but that's probably just my faulty memory, after getting out of school (USAOC&S) in Feb76, I never saw them again.

However, I have to ask (because obviously I'm still missing something) how firing a 105 RR round in a 106RR (assuming it could be done) would destroy the 106RR. Wouldn't the gas just be vented out like normal?

I can easily see how firing a standard 105mm round (like tank gun ammo) would destroy the RR (and injure the crew, most likely), and therefore the ring around the firing pin to prevent touching off a standard round makes excellent sense.
 
I believe the 105 RR was a 'caseless shell. I know I saw one shot once. Several wooden cases from the rounds were stacked right behind the gun and it was shot.
I dont believe you could find a toothpick from those several round cases..

So that case you are working on was not brass or I guess it would not have rusted. Any ideas what it is--iron??
 
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