Thanks for the great replies.

In the photo that I have(sorry for not being able to post)

1. M190_ is clearly visible.(the 5 needed a lot of effort)
2. The ' KAL 7.62x63' was very well engraved(better than on kuduae's gun) and is below the model inscription. Thanks for the photo 'kuduae'.

I had taken a box of new 30-06 rounds and it fed flawlessly.

As DonZ says it is probably been rebarreled in some way.