I think that is sound advice! but I will push back on the 100 yard grouping versus 200-300 plus yard groupings. This has been tested extensively and has not been validated. If the gun groups well at 200 or 300 yards it will group well at 100 yards. No bullets don't stabilize and shrink groups the farther they fly. Garbage in, Garbage out...
Now, if anyone, not calling you out, wants to disprove this? Please invite me to witness, Applied Ballistics will pay for you to discredit these claims. Free ammo, free trip etc... It has yet to be validated that groups group better at 200 yards plus. I learned this the hard way! Got my butt handed to me by Brian Litz. I met him at Berger one day when he was visiting.
What you guys will see with groups shrinking at distance is an issue of too much power on your optics, parallax, etc. At distance you are more focused on a finner (smaller) point of Aim, so you think your groups are shrinking, in reality you shot better. Power down your scopes or use a smaller target for your POA, like the triangle of a target, see picture below. My POA was the far orange triangle . Yes I got excited and pulled my 5th shot on my new 300 Norma barrel, yes it had zero break in done.... which goes to show is barrel break in really
View attachment 356167 necessary... depends on your barrel, I haven't to do it, but that's another thread
yes the POI is not my POA, if you shoot out your POA what are you aiming at?... just a friendly tip