Hello, new to this sight, I have acquired an older Hi power from my Dad. He purchased the gun used in 1968 and has not fired it much. It is a (#54824) numbers matching gun, magazines and holster. After cleaning it I recently took it out for some practice and it has a spent case ejection issue. They will stay in the gun more often than not. I called a local gun smith and he told me the problem is more than likely my ammo, which is 115 grain FMJ, he said I should be utilizing 124 grain FMJ. I have read articles that state this gun should do both. I would appreciate any info someone can shed on my issue and possibly a gun manufacture date.