I don't have that problem anymore. A meatcuter i know told me to make sure the deer is cleaned well and cool it off. When you cut the meat there is some small glands inside of the hind quarters and front shoulders that look like small gray lima beans, get them out, if you cut them open anything the knife, your hand, or the gland touches will be contaminated and have a strong gamey taste. This can also happen with store bought meat such as lamb or beef. I've shoot deer in east texas and california, in texas the weather is cool to cold70 or lower in calif. it was near 100 and all my deer always run, good shots just bad luck so I don't think that running has much afect on the taste