One of the things that one gets into when reloading for a specific gun is that the load specific to that gun may not operate in another gun of the same caliber.
That is especially true when working with light charges in semiauto pistols.
I have found that I must go to the high side of the data chart and load near max so that all of my pistols will function reliably with my reloads, especially in 9mm.
Many of the 9mm pistols on the market today are calibrated for the NATO round, which is far stronger than the US factory load version of that same round. As a result all of my cast bullet 9mm loads are near max, but not over. (that and if I am shooting a 9 I want a max load!)
I have found the same to be true of 45acp. If I load a good stout charge, just under max, the rounds will work in any pistol I own.
Even if you only own one gun you need to load to at least the factory specs and not below. You may decide to trade guns and then will get stuck with several hundred rounds that will not reliably function your pistol.