Well, yeah, I expect there are a few .357 Magnum loads out there. ;-)

You've got a fine revolver. And those CCI Small Magnum primers ought to work just dandy with H110 and those XTP bullets for making up some stout, accurate loads.

As a general rule, you ought to be start with load data from the manufacturer of your bullet. Sure, you can use data from a different manufacturer, using a similar bullet, but you need to be careful. If you're going to do that, the recommendation is to extrapolate from several sources... what you're looking for then is a general consensus. Using a single one-off load source that's not from your bullet maker is kinda out on the limb.

Hornady's #9 manual lists H110 loads for your 158gr. XTP starting at 12.7gr. and ending at 15.6gr. So your pressure series started near the maximum, and then quickly went well beyond it.

Any particular reason you jumped the last load in your pressure series a full grain, after advancing in half-grain steps before that? That's a dangerous practice. You want to be extra careful as you approach max load, not less.

The second pressure series you're working up sounds much more reasonable.

As others have mentioned, your original crimp sounded light. The third picture you posted looks about right.

And, finally, and please don't take this the wrong way... but asking for load data from your pals - that would be us - is kinda like asking the fellow next to you at the range if it's safe for you to shoot. You own what you put in that cartridge case, just like you own where that bullet goes... so do your own due diligence.

Good luck!