This topic came up and BruceP would like to get info on the matter of barrel fouling with this unnecessary procedure.
Having started reloading for different calibers in 1971, primarily for my 1958 Winchester Model 94 3030, I experimented with different types of bullets and loading methods. As my experience, and exposure grew, to the pastime, I began casting bullets, and experimenting with gas checks, and different bullet lubes, including recipes of my own. I found that some lubes fouled worse than others, and discovered a recipe of a friends that fouled very little. I adopted this one, and modified it some on my own. BUT! That is not what this thread is really about.
As my career changed and evolved I grew more involved in other calibers, and accuracy, and quite by accident discovered the above thread title to be true, which is BruceP's wish for information. While sizing 2506 from 3006 brass, I found the problem of neck stretching as the expander was pulled from the case mouth, so I used a case neck brush, with RCBS lube on the cases to prevent, or retard the stretch. When the brass was finished, it was cleaned INSIDE, and out before it was loaded.
In a hurry for a night hunt with friends once, I neck sized some 40 rounds of brass, and used the case neck brush to clean the case mouth for this procedure, with out cleaning the brass, and loaded the ammo not thinking about it. That night on a wheat field while shooting called in coyotes using a million plus powered spotlights, I and my hunting partners noticed a vapor trail running more than 20' out the muzzle of my 2506. What was it? Smoke from burning residual case lube. While they thought it looked pretty cool, I knew that it was not only fouling the barrel as it burned in the powder's hot gases, it most likely was increasing chamber pressures, as the bullet was riding on a thin layer of case lube between it and the bore. Next day inspection showed a much dirtier than usual bore, and no doubt accuracy suffered as BURNED CASE LUBE built up in the bore. One friend liked the odd vapor trail so well he wanted to know how I did it. I told him what it was, and that it was not a good idea. He didn't listen, and load his next batch of 220 Swift installing the case lube brush. He got his vapor trails, along with a fouled barrel, and accuracy suffered badly.
I have never heard of any REAL reason to use case lube on a jacketed bullet to get it to seat properly. I have seen dirty, or mishandled cases, that were hard to seat, but it was almost always due to inferior prepping, or inferior cases.
Now with that said, let me state that, I am not trying to prove a point, I am stating what I know from over 40 years of loading experience. Your experience may be different, and you may disagree. That's ok with me, cause I don't really care. I have pretty much always loaded by the book, and with the exception of cast bullets have experimented only with bullet weights, configurations, and powder charges, searching for accuracy, which has nothing to do with this requested topic.
