· Super Moderator
You have to be careful with heat. Much over 450 degrees can change the temper on heat treated parts. Heating to red hot and letting air cool is annealing, making the metal softer than it needs to be. If you do that, continual shooting will see the parts stretch and wear prematurely and in some cases it can be downright dangerous because the heat treated parts are weaker than they need to be. A gun with improperly heated parts can turn into a grenade if fired.