I have been loading 10mm since 1992. I long ago settled on the 180 grain weight because that is what I seemed to have the best ability to find bulk bullets in over the years. And here is another hint that may not be obvious from the outset...
When loading any semi-auto pistol round, case mouth tension ('bullet pull' or the case's grip on that bullet) is of extreme importance to avoid unnoticed and/or unintended bullet setback. You may find that if you try to use R-P brass in 10mm, you will see varying degrees of success in this area.
A heavier bullet means a longer bullet, if all else is equal. The longer bullet tends to sit a bit lower in the cartridge case and you gain surface tension -- you gain bullet pull. This is a very good thing.
I know that some boutique ammo makers build some irrationally high velocity 135gr 10mm loads and I have no experience and no opinion on them specifically. But as a handloader, I have no interest in a bullet that light and this is mostly because I need and want all the bullet pull I can get.
My favorite powder for 10mm is Alliant Power Pistol. Beware that it is excessively flashy and IME, it offers more blast and (possible?) felt recoil than it probably "ought to" for the velocity it returns. Not to say that it doesn't send a 10mm slug fast (it does!) but my point is that it feels HARDCORE when you shoot it but a chrono will tell you that it won't match the speed you can gain with some other powders.
Hodgdon Longshot is a fine powder for chasing high velocity in 10mm and it is easy to work with. IMR-800X may be the velocity KING for 180's in 10mm, but I don't think there is a more obnoxious handgun powder to deal with in a volumetric measure, EVER. If you have an electronic dispenser, 800X is a decent option. If you don't, it is a hassle that you have to experience to appreciate. I recommend a one-pound can so you aren't saddled with it.
Blue Dot seems to be popular, but after eating through just over a pound of it, I'm done with the stuff. I don't care for the way it runs anywhere I have used it and it's not much fun through a measure either. Blue Dot also has the added joy of very cryptic warnings directly from Alliant. So I won't ever recommend it to anyone because there are so many more that will do so much better.
Accurate#7 is a pleasure to work with but it's not at all easy to find, IME. #2, #5 and #9 appear, #7 seems to be the redheaded stepchild.