OK, so Teflon IN the bore has no useful purpose, If it did we would likely be using a better friction reducer that does not burn and give off toxic fumes.
Teflon IN the bore made the T7 crud ring far worse if not thoroughly removed before firing. I had to use brake cleaner to get acceptable results. MX products did not show this side effect at all. When using BH209 the fouling had almost a sticky consistency and my first shot POI was off much more than when using MX products. Using MX i could just fire 2-3 primers and dry swab once after to achieve extremely good first shot POI. The testing in a 308/7.62NATO rifle by the US military in a M14 IIRC, it took roughly 20 shots before the rifle settled down and grouped well.
http://www.imageseek.com/m1a/M14_Preser ... cation.pdf
Anti-wear (AW) additive - Solid lubricant pa
rticles are dispersed in grease to prevent
metal-to-metal contact of lubricated surfac
es. These solid particles are known as anti-
wear additives. Phosphorous
and zinc compounds and suspended
polytetrafluoroethylene (PTFE) are common AW
additives. Anti-wear additives are useful
up to about 465 to 480 degrees Fahrenheit.
Above that temperature range, the
compounds begin to break down. Anti-wear addi
tives will reduce the oxidation resistance
of grease. Consequently, grease containing an
ti-wear additives will need to be reapplied
much more often than grease without
AW or oxidation inhibitor additives
Additionally, CLP with PTFE
additive left in the bore will cause erratic
accuracy for as many as twenty shots out of
the rifle until blown out of the muzzle.
Experience of the U. S. Marine Corps found that when CLP containing PTFE additive was
left in the bore of a M14 rifle it would shoot erratically until the CLP had been blown out
after the first fifteen to twenty rounds of fire. The accuracy would return indicating the
washing out of the CLP with its PTFE additive
In a 1973 study of PTFE resin coated cookware, pet birds were found to die from the toxic fumes of PTFE when the PTFE resin coated cookware reached 536 degrees Fahrenheit
As PTFE is heated above food cooking temperature, it begins to emit ultra fine particulate matter at 464 degrees Fahrenheit. It melts at 621 degrees Fahrenheit. Further heating of
PTFE to very high temperatures results in the release of several toxic gases:
At 680 degrees Fahrenheit - difluoroacetic acid (DFA), hexafluoropropene (HFP), monofluoroacetic acid (MFA), perfluorooctanoic acid (PFOA), tetrafluoroethylene (TFE)
and trifluoroacetic acid (TFA)
At 878 degrees Fahrenheit - silicon tetrafluoride (SiF
At 887 degrees Fahrenheit - perfluoroisobutene (PFIB)
At 932 degrees Fahrenheit - carbonyl fluoride (CFO and hydrofluoric acid (HF)
At 1,112 degrees Fahrenheit - octafluoro cyclobutane (OFCB), perfluorobutane (PFB) and trifluoroacetic acid fluoride (CF COF),
At 1,202 degrees Fahrenheit - carbon tetrafluoride (CF)
If it takes that many CF shots to settle down, you can only imagine how many sabot loads would be required. Granted i cant imagine a ML barrel reaching temps high enough to burn PTFE but if it has no benefit, why use it at all IN the bore? There are plenty of other options that dont contain Teflon at a similar price point.
Yes, medical grade light mineral oil is the main lubricant in Ballistol and MX products, have you ever looked at the RemOil MSDS? The top ingredients listed are mineral spirits and aliphatic hydrocarbons. Its not a true synthetic either yet it cost more than a good automotive synthetic like Amsoil.
For a while I tried to go back on any gun recently used after a few days and do a recheck. Sometimes I do, sometimes not.
