I would say it could. When I worked up a load for the Federal Guard Dog bullets Midway was selling at 9c per thousand some time ago, I made tests at various COAL increments (there is no published data for this bullet) and noticed a difference in accuracy. For example, same powder charge, headstamp, and primer:We're talking 0.01" as having suspected yet measurable influence on POI on target? Have you measured a sample of factory rounds to determine their range of compliance with given spec?
EDIT: fixed mistake at 1.11" -- got crosseyed looking at a spreadsheet.