I have never understood that as of the maybe dozen or more I have owned, they have all been totally reliable with any normal ammo. I shot everything including my own handloads with no problems.
Now there were occassional problems but they were always the fault of the ammo, not the pistol. By that, I mean bullets seated so lightly that they were forced into the case when they struck the ramp, etc.
I do agree that the Beretta is more reliable. In fact as I said earlier on this thread, it is likely the most reliable pistol made with the possible exception of the Sig P226.
It sounds like you have done more shooting with the .45 than me so I will defer to your experience but still think you are overstating the reliability problems.
BTW, my Father worked at Eglin for 35 years and spent a lot of time at the test facility where the first round of JSP testing was done. The Beretta was the clear winner. The Army couldn't stand for the air force to be testing pistols so insisted that the tests were not valid. They redid the tests with the same outcome. The Beretta (and Sig) beat everything else.
The Beretta would be ideal if it had two improvements, One the grip is just a little too thick, and the trigger pull is heavy.
"Actually the .45 has an undeserved reputation for jams in my opinion."
It's been my experience that that reputation is well deserved. And it pains me to say that. It's like insulting the Pope, but the truth is just that.