Welcome to the forum and thanks for your service. That's a nice rifle. I am a member of Red Castle. The long rang is 600 yds and is always open. There used to be a gong set up the hill to the right of the target butts but it has been removed. Sighting in my sons 1000 yd rifle we set a target stand up close to where the gong used to be. You get about 800 yds doing that. I also would like to find a place for long range shooting and have thought about approaching the sod farm owners near Haskell that have land along the Arkansas river.