Originally Posted by
geargnasher
MJ,
Another theory of mine, along these lines, is leading toward the muzzle. Some would say that the lube is "Running out", and I have always thought that was wrong. What I used to think is that the velocity of the boolit toward the muzzle overcame the viscosity of the lube and sort of "hyroplaned" over the lube at a certain point, which caused lead abrasion, gas leaks, and leading due to the effects of that. Now I'm starting to think that the pressure drop-off behind the boolit spoils the obturation by dropping below the yield strength of the alloy, so the boolit literally relaxes and returns to it's un-flexed state, where it might not fit as well. If the lube can't act as a stop-leak at that point, the gas leaks around the boolit and it leads. Just a thought.
this is something i was observing in my 44 mag levergun with carbuba red and could manipulate the lube smear up and down the bbl with a different powder volume.
i know i was not running out of lube as i could see it still on the found boolits.
Here's another thing on my mind that came up when I was dinking with the carnauba and ester oil and the hot wear-tester last night: Is there a way to make a boolit lube that has the same CoF between barrel steel and boolit regardless of temperature? If we aren't relying on traditional thick, EP oil film and viscosity to give us our CoF, then can we make a lube that has the same "slickness" when frozen solid or when melted at two hundred degrees? MJ and I have both observed the carnauba feels the same in different states when treated with a thin oil, I'm wondering if we've been barking up the wrong tree trying to get a viscosity-stable lube when all we need is a lube that has the same FRICTION characteristics whether solid or melted. Can it be done?
Gear