Different strokes for different folks!!
My way to look at it : I pick a good load for a rifle,sight it in and learn to use it.For me,in a 30-06 that would likely be a 180 gr,or maybe a 165,depending.
In either case,a Sierra Matchking would likely perform like a ball round on a coyote.
Y'all do it your way,but to re-sight in with varmint bullets for one thing and medium bullets for something else,etc leaves me with a rifle that is never ready to go for what is coming next.Its still set up for what I did last,and all the different loads and components!!!AAAhrgh! I prefer simple.
If I was using my 30-338 to shoot prairie dogs,I'd do it with the same 200 gr Accubonds its sighted with,more than likely.
But thats just me.
Texas Heart shot?