This will be my first time removing a factory barrel from a 700 reciever. Supposedly they put some really tough thread-locking compound on the threads, at the factory. And the best way to avoid damage [or other hassles/problems] is to "cook" the compound, so that it looses it's hold on the threads, while applying the unscrewing torque. But I have not heard anyone say what temperature must be achieved to make it happen. My concern is that applying too much heat could remove whatever temper might be in the reciever metal. What I'd like to know, is what temperature needs to be achieved in order to cause the compound to release, and/or what temperature should NOT be exceeded, in order to not ruin the metal's temper, if it has any. I will be using vice blocks and a #2 wheeler action wrench. For heating, I will be using a 1500W heat gun, and temperature meausurements will be taken using an infrared thermometer.