Welcome from central Mississippi.
Check the site sponsors. They will have plenty fine choices for holsters. It will all really depend on what you are looking for in particular. Just about any ammo will work for plinking as long as it is affordable. For defensive rounds, there are many good choices out there. I personally carry the Winchester Rangers in my HK. A lot of people are talking really good about the Federal HST's. Here is a link to a thread running on here talking about them.