First, It's my understanding that a hot barrel is bad for accuracy. Can anyone explain why this is the case?

Second, do you shoot in the summer? I live in KS and it won't be cool now until October. Furthermore, my range is only open from noon till
6 pm.

Last week I was shooting a Rene with PRB with mixed results. It was around 90. By the time I would think a little, swap and reload the barrel was still warm / hot.

Can I draw any solid conclusions from these sessions? Any advice for the summer shooter?

I'd hate to shelf them for the summer. The thought of playing golf is not that appealing and my wife needs me out of the house doing something.