I have been loading for my 6.5 Grendel for a bit now. I have only focused on hunting cartridges though. So, as I have been ignoring this rifle for way to long. I want to start punching paper with her. With the appropriate bullets. Going to start off with some Hornady 123 Grainers. My question is this, as I am fairly new to the AR Platform precision game(all of my long distance precision guns are bolt action). As a starting point, what as general rule of thumb for a jump to the lands in an AR Chasis? And yes, I know that every gun has it's own fingerprint. Just looking for a comfortable starting point...