I understand the heat issue. Here in Bowling Green, KY (Southern KY) it was 91-93 today and humid. Then some heavy rain came in for half and hour and immediately afterwards the sun converted the wetness to steam I believe. Choking humidity that kept me from getting out shooting any earlier than a couple hours before dusk. Only 6 1/2 weeks ago I had rotator cuff right shoulder repair surgery and have to be cautious manipulating my new rifle also. So there's that for me. I'd read here that the heavier pellets seemed to perform some better in these multi-pumps. That appears to be the case at least for my 392S. Hope your shooting goes great! Don