Pointed ones have the Nazi eagle on them? Produced it 1938? Seem to be pretty common.

So the pointed ones won't chamber. I was meaning to investigate that. Now I'm really curious.

Results of the experiment:

A full clip of 8x56r will load and lock in place so that answers the clip question.

The first round will strip out of the clip.

The second round was jambed deep into the magazine with the point hard into the front of the magazine. I suspect rounds 3, 4 and 5 are also wedged in there. The pointed bullets are too long

Hitting the clip extractor immediately pushes it up and out but the points of the bullets catch on the rear of the receiver and you have to mess with the bullets to get the clip out.

I attempted to chamber a round by pushing it in with my finger. It would not go all the way in. Possibly still full of gunk, but the neck could be different, haven't looked into that. It was approximately 1/16th of an inch protrusion.

I did not attempt to close the bolt on a round. Don't need that kind of potential excitement.