So, IMHO mag dumping is just for giggles and should only be done once in a blue moon. It's wasteful and ineffective. And, you don't heat up your grip at that rate.
If you are dumping enough rounds to heat up your grip enough to make it uncomfortable on your hand then you are probably heating up your barrel enough to damage it. Just my 2 cents and I don't care enough to argue about it so if you disagree then you do you!
Oh it's definitely for giggles. I'm perfectly happy to spend money to put holes in paper.
I'm confident it's not going to damage the barrel to any degree I care about. The pain threshold is something like 110°. I'd have burns by 120 or 130° holding it with my bare hands. I'm looking for solutions for that, not putting a FA lower in so I can heat the barrel to hundreds of degrees where you start seeing throat or rifling damage.
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