My Hornady manual lists 7.3gr as max with that powder and bullet, but note the test firearm. The one used in my manual was a Ruger Blackhawk Bisley.
Different guns have different strengths, but anything within SAAMI specs for pressure should be safe in any modern gun.
That being said, "safe" doesn't mean "best". It means "won't damage the gun".
That being said, different guns handle pressure differently. That's why there are different "max" loads in different manuals. Each combination of components and firearm CAN behave in unique, different ways.
Most fall within the middle of the bell curve, but your gun and ammo combination being at either end of the curve is always possible. That is why the standard advice for reloading is ALWAYS start below listed max and carefully work up to it. Many will recommend starting below the starting load. And below meaning 10-15% below.
I've seen guns that flattened or cratered primers and even stuck cases in the chamber at below listed book max loads. I've also seen guns that fired loads well over listed max with no noticeable effects at all.
You do not, and cannot know what your gun and ammo will do, until you fire it, and anytime you change anything, the total combined result can be changed. I remember as a beginning loader how it was frustrating to have to use up valuable components starting low and working up, it just seemed a waste to me. Until I had an ..incident. Then I gained a entirely new understanding.
Here's something I've personally seen, some .357 ammo, loaded hot, but slightly less than the listed max in the Speer manual of the day. Fired through 2 different revolvers, a semi auto, and carbine. The load was just picked out of the book, not worked up in the guns. One of the revolvers needed to have the cases driven out of the chambers with a rod and a hammer. The rest all worked normally.
You picked a very fast powder (231) a fairly heavy bullet, and you loaded just under a listed maximum. It MIGHT be ok, it SHOULD be safe, but no one can say with absolute certainty in YOUR gun, until it is fired.
You can run the risk, or you can tear down the ammo and then work up in steps until you are sure. Either way, you are the only one responsible for your own safety.
Another point I need to make, something you REALLY need to pay attention to when loading fast powders in large cases, and that is to only get ONE charge of powder in each case. A .45 Colt case will hold over 3 times the max charge of 231, and more than double the max of some other powders, and a double charge will turn any pistol into a grenade. The way I check is to put all charged cases in a loading block and (with a good light) check the level of powder in the cases is all approximately the same. Any high or low, the charge gets dumped and redone, and weighed. But, that's just me...
Welcome to TFL, we all started out about where you are, and we're here to share our experiences in the hope they'll help.
Don't be afraid to ask, even when it seems a stupid question. we've all been there many of us in the days before there were friendly folks on the internet to help.