Scope POI Shift Because of Heat

Discussion in 'General Airgun Chat' started by luger, May 3, 2010.

  1. luger

    luger Malta's GOS!!!

    Nov 10, 2009
    Malta Allied Airgunners Club
    Going straight to the point here................can heat effect POI shift on a scope?

    Scope is a Nikko Diamond MK3 and the gun is a HW97k so usual pcp cylinder overheating is excluded.

    Only asking as I have recently experienced a POI shift 2 times (shooting low about 1"-1.5" between 25m-30m) and both times in scorching heat. Been shooting for about 4 hours under direct sunlight (and yes got sunburnt too :eek:) last Saturday and today and after about 4 hours shooting I started hitting low. Chronod the gun and fps was constant 770's so no velocity problem there.

    Things indicate scope POI shift because of the heat but I have never heard or read of anyone experiencing such a problem.

    Is this possible or could the culprit be something else? :confused:
    Last edited: May 3, 2010

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