45acp is, in my opinion, at little more picky about powder than 9mm, since it operates at lower pressure. Having said that, there are a lot of powders that work well in 45acp. W231 works well, but I will agree with those that Longshot is not one of the best powders for 45acp.
For full throttle loads, CFE-P, BE86, Power Pistol are good. For lower velocity loads that my wife likes, my favorite powder is Clays. Trailboss even works well.
The negative about 45acp are the two primer sizes that exist. A lot of the new 45acp ammo on the market are now using small primers. So, you have to sort the brass according to primer size. Large primer has been the tradition since the cartridge was first developed, and all of the load data you will find were developed using large primers. Generally speaking, you will not notice a difference in performance between the two unless you use a chrono, and then you will see about 35fps difference in velocity. There have been two powders I have tried where I saw over 100fps difference, those being PB (discontinued) and Trailboss. So, just be aware that the primer size and powder used may have an effect. I actually prefer small primer 45, as I don't have to change the primer size on my press, but I have settled on using small magnum primers as I get closer to the results I get with large primers.