8mm chamber reamer for throating?

Hi all,

Just wondering what to do about adapting an ammunition store (IIRC) barrel to handle Yugo 8mm.

Putting a round into the bare barrel shows some resistance and magic marker on the bullet indicates the ogive is rubbing on the lands.

So the thing to do is twist a reamer with a longer throat in there -correct?

And then the question becomes where to get said reamer...

Thanks for any and all comments.

C