Ed, all I know is they work great on buck deer.
Snap, if shooting very far I generally have a bipod attached and that really settles the rifle down. Purists be damned....grin
A lightweight rifle with a bipod attached might not balance 'perfectly' but I think it's the way to go for a walk around open country hunting rifle.
Might remove 1.5-2" of barrel.
Chiro, my (older)243 lug screw was shorter than the 270(which was fine unbedded) but I ended up replacing them both after bedding.