Hi 44magleo, Yeah that could be it (Look guiltily to the ground, kick some stones, hope for a distraction......).
Also because I'm below the equator and for us water swirls down the toilet in the opposite direction to the USA, perhaps this effect can also influence projectiles ?
But on a serious note, I'm trying to encourage RiverRider that he should be able to get quite satisfactory results from his rifle, I'm happy with mine.