Chris,
You are right. Guess a .20 would hardly rate as a GA Precision "Pebble", how about a GA Precision DUST SPECK!
Loosened and re-torqued all the screws and bolts on my ROCK yesterday, took the NXS right off, Badgers apart etc. and gave it a good cleaning, got rid of dirt and dust accumulated from the Badlands to the arctic. That **** red dust is impossible to get out of the fine threads in the front of the scope!
Went out to the range and checked the zero - did not have to touch the turrets, the rifle was still perfectly zeroed. Only shot three shots, one fouler and two that touched in the X and went home.