Yes. Over time, one eventually witnesses all. Years back as we were preseason zeroing, we met a gentleman insisting we were doing it all wrong. One must zero firing from an off hand standing position.
There's actually a smidgen of truth to that. I noticed a lot when I was an avid smallbore silhouette shooter that I was off by a little with my offhand practice shooting versus benchrest sight-in. Differences between rest versus hand hold don'tcha know. (That's not to say I don't sight in off the bench and call it good today.)
