All the LR matches I'm aware of are in the coloradomultigun web site, other than NRA HP long range. They are going to expand the KD matches at CRC this year, I believe.
If you can make those hits and understand the technical stuff, you have the building blocks to step up to the next level: field shooting. There is no substitute for doing it, so I recommend that you come out to the Sporting Rifle match and shoot that. The "weird position" shooting there is limited (unlike the Steel Safari where we make things harder)