Thankful you guys shared the article in this post because it is gone from original publication. I'm trying to figure out why 6.5x54 Mannlicher Schoenauer 156 Grain Soft Point Ammo by Prvi Partizan - PP6MS - does not want to work in my 1903. My 1925 (proofed 1929) does not have the rings on the magazine but it cycles modern Sellier & Bellot ammo without issue (slight hang up on 140 gr SP).