I have a 1953 Egyptian made Hakim designated marksman rifle. I am unsure how familiar you all are but it is a semi auto marksman rifle made for desert combat based on a swedish(I thinK) and German design from the post WWII world. It fires the 7.92X57 round aka 8mm Mauser. I have been told that in the hieght of production not every one rifle had the same "roominess" in the chamber. Only certain ammo works. I recently tried to ease my wallet and used cheaper ammo. the ammo didnt fit although I did all the research. The round separated and I have gun powder everywhere. I thought I cleaned it up and resumed function tests and now the bolt/boltcarrier/dust cover is stuck forward. I dont know if its a simple fix and try to do most maintenence myself. Please advise, Thank you!