Guessing that guns that diesel and especially those that detonate will produce higher temperatures. But also that the heat produced will be dissipated away quickly anyway.

Purely out of interest (as such a rapid rate of repeat fire won't actually bear my relevance to anyone's actual shooting habits apart from maybe making tin cans bounce about, CO2 stylee) it might be enlightening to see how one of the new Gamo magazine fed rifles performed comparing consistency in slow & deliberate vs "rapid fire".