I don't like shooting in the heat, but I still do sometimes. I bring 2 rifles and alternate shooting, taking breaks. It is still good practice and fun, but I've found that I usually need to have an extended range session in the fall when the weather is cooler to do my final sight in. Sometimes the POI changes, sometimes a load that shot well in the summer doesn't do as well with cooler weather and vice versa. If it's 90 degrees of less, I will consider going out and shooting. Over 90, forget about it...