Steyr m-95 with weird chamber...Please help

[Zradix]

Hello!
I'm really at my wits end with this one.

I came across this Steyr m-95.
But I can't figure out what it's chambered for.
The bolt is for rimless cases.
There are no stampings indicating a rechamber.

The thing that really threw me is the 0.48" shoulder dia.
The apprx 1.7" shoulder ht is of course a stumper too.

In the pic I included the 8x50r to show shoulder angle comparison and length.

The center brass is what I made from 284 win brass and has been fired in the gun 3 times.

The case on the right is new 284 win brass.

The body of the 284 win is just about right on for what's needed.

Any clue what I have here?

Thanks a heck of a lot.

John

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