How about this for an idea? Cut your starting load down to 10% below listed starting load (@ 4.5 gr.) at your desired OAL and increase charges 2 to 3 tenths-of-a-grain til gun functions how you want. That's called "working up" a load, a concept that seems to be lost in this day and age. I'm guessing you'll get to fishbones' load and have room to spare. And 1.240 or so is what I load with 230 gr LRN in both my 1911's.
BTW, loading dummies to check for function doesn't necessarily tell you what happens when you actually shoot the load.
"I should have picked alcohol, drugs, or beating my wife..."