While I am just getting started on the really long range stuff, I can connect you with some folks who have a ton of experience and common sense knowledge about the topic. MarkandSam Afterwork, funny name for a long range site but really good info.
Amazing You Tube channel for long range video’s but also info based video’s that you will find really helpful. The link below will send you to their webpage, which has an index and links to their youtube stuff.
And if you like what you see, please support them. It does cost money to put out the information they share and it is a ton of information. They also have some great stuff in their store (It’s in Australia…) So be sure to buy something or just support the channel!