The M95M Yugoslavian rifles used to be fairly common, that was more years ago than I like to think though.
They were rebarreled to 8x57mm Mauser.,,seems like they had a stepped bbl profile like a 98 Mauser.
They used standard issue military ammunition in 5rd charger clips. A warning used to common against shooting these in 8x57. 'The action wasn't strong enough,,ect'. I never heard of any problems nor
had any myself. I think it was probably a lot to do with the fear of the straight pull action.
No 5rd enbloc clip necessary.
** The problem with them is that the magazine conversion to use the rimless 8x57 Mauser required an insert to work. The rifle still uses the old calibers magazine follower, but the spring steel insert is needed to hold the rounds in the mag.
(added...I had originally posted that I had remembered them as looking more like a Carcano en-bloc clip,,but that is not the case obviously. So much for a sharp memory.)
But the mag insert is put into the rifle as it's assembled and stays inside there. It becomes the feed lips of the magazine.
If you don't realize that it's supposed to be there, it can be missing and you won't even notice.
They used to be a fairly easy accessory to buy, but probably a tough one to locate now.
If I remember correctly, the small extractor on the 8x57 conversion is also different from the original rifle caliber. It's been a long time since I've had one of these so I'm going on memory.
I remember they were often missing from the conversions. Seems like fits underneath the altered original and used the tension of the original to work.
The bolt will appear to operate fine w/o it in the rifle when worked manually.
But when you feed a round into the chamber (providing the 'insert' is in the mag!), you can't extract it using the bolt.
With all that,,I kind of liked the old beasts. The M95's were almost rare then, ammo for them was unheard of. The M95M in 8x57 was just strange enough to keep the price down and ammo was still inexpensive.
I might even still have one of the inserts somewhere...
....added pics,,I did have one M95M mag insert in the box-o-mags drawer:
Spring steel. You can see the punched out detents on the sides that keep it in place in the rifle so it doesn't fall free after the last shot like the 8x50R/8x56R style
They rattle around a little when in the rifle but stay back against the rear of the mag well so you don't have to fiddle with them in loading.
You can also see why it's an easy part to miss if you're not looking for it in the assembled rifle.
Hope the info and pics help..