Shakari you remember my friend Hoti,he and i went on a safari together to SA and during the shooting in with a 375H&H he got a nasty cut on the eyebrow with the scope.I was a bit nervous then as neither of us had handled anything bigger than a 7mm.mag. before.My first shot completely missed the board and i felt real shitty as i considered myself to be a pretty good shot.However i did well with the next two shots and that was the end of the "sighting in" as far the PH was concerned.He probably thought we were novices and there was no point in wasting any more ammo.When the very next day i shot a fallow dear at 350 yds.with a 300 WBY.mag.dropping it in its tracks he changed his mind and did not hover over my shoulder again.
Sometimes the lack of experience with an unfamiliar caliber tends to make you uncertain and you require a little practise to bolster your confidence.