I would say Atlanta Arms because they make a Production-specific load, but noting your location, it is probably not available.
You may have to experiment to find a feel you like. I like heavy-for-caliber bullets loaded with small amounts of fast powder. More of a push, less snap. But others want snappy because they believe it runs faster and that means lighter bullets and more, slower powder.
Just be sure to get a gun on the approved list, IPSC Production List