In answer to you your comments, yes 300 yds can be affected by wind, not as much of course as the 600 and 1000 yd guys but its a factor (100 yards as well but not as much and higher velocity to do so in that shorter distance)

So any fine testing you want to do should be done at 100 in as calm a conditions as you can reasonably get as per your note, removes all variables.

No one I know of is bedding the barrels, Savage free floats them.