I've loaded 9mm tons of times,
No offense intended, but it doesn’t sound like it.
Loading over book max is not something done on a whim because the Lee charging disk couldn’t dispense the proper amount.
Given the extra length in the rounds is is safe to shoot the ones around 7?
No. You have an idea how it works, but it doesn’t quite work that way. It isn’t linear. Within the window of the case actually seating a bullet, making it shorter exponentially increases pressure, but making them longer doesn’t exponentially decrease pressure.
Pull them down. You have a Inertia hammer, yes? Or set them aside until you do.
While I doubt 7 grains of Universal will blow up a name brand .45, I am very concerned over how you got there. Further, even 6.4 is the Hodgdon maximum, not the place to start. And I wouldn't be loading Defensive ammunition at the by guess and by gunboard.
Bears repeating.
Know why you are doing what you are doing. Don’t guess. That’s how you show your kids how your pinky doesn’t work anymore while you clean your glass eye.
Further yet, the Colt Comp1911 (nice choice by the way.) could digest things the Glock would crack under.
Or vice versa, a competition pistol is not usually one that is carried, depending on the competition.
Hey, you didn’t settle for a $400 ATI commander. You bought a Colt.
Don’t settle for haphazard ammunition.
Especially if you’re going to carry it. (Handloads for defense issues aside...) Rounds that are too hot are just as bad for reliability as weak ones are.
Try the mod and load choice rounds at book charges.