Thanks, I appreciate your comment.

6.5CM...Nice choice. I shoot it also and achieve well past a mile easily. It's a nice flat trajectory. If you get your system set up well it will perform. Obviously you're planning to LD your own rounds which is the only way to go really. For that reason I've added some information from Strelok Pro as below. Keep in mind this is my rifle system and yours will differ. I've started the chart at 1000m as below that it's all pretty elementary. I put in 1mph wind, full value which is why you'll see windage adjustments in the chart. The yellow is where it goes transonic. Please also keep in mind I'd usually have the chart set on 25m increments, not 50m, I've done that to fit the data in without having to scroll.

If you want 0-1000m data let me know and I'll send in another comment.