I wouldn't worry about PTFE as Rem Oil has used it in their oil for years . True , many gun oil makers have moved away from PTFE - if it is a concern I just would not use it down a barrel , however the amount that could turn to fumes is miniscule .
Originally Posted By: AMC
Hmmm, that's a new one. Super lube is an H-1 certified food grade grease and rated to 450F. Super lube (Synco) also make greases approved for use in nuclear facilities, rail roads and plenty of other things. I wonder if their lube engineers have ever heard of this.... You better call them asap and give them a heads up.
My understanding of PTFE is that it can off gas and create (tiny amounts) hazardous fumes once it reaches 392F but I have never heard of it turning acidic or pitting anything. Some chlorinated compounds are known to pit steel, is that what you are referring to?
Forget any of that for a minute, unless this rifle is full auto; what part of the bolt or receiver (or any of the real friction areas) are ever going to reach 392F ?