No, I don’t. It just seems prudent to keep any greases/lubricant contamination out since it is a known way to quickly de-activate primers (immersion in oil). And also, my experience with pyrotechnics has taught me contaminants of any pyrotechnic mixture are never good, and can be unpredictable.Do you have any data to prove that happens?
It just seems prudent to me to keep things clean, not to mention the insides of cases do not need to be lubed that I'm aware of.
EDIT: After some research, there is no definitive proof lube itself is detrimental to the reloading process although I have read several reports of FTFs if primers are handled with oily fingers. The most common problem with getting lube inside the case seems to be the powder can stick to the walls of the cartridge causing a powder "bridge" clumping and keeping powder from falling all the way down to the primer.
The lanolin will not compromise or contaminate the powder. Other lubes will, but lanolin will not. I've loaded plenty of rounds with lanolin residue on the bullets (I swage my own jacketed bullets for rifle), and they have sat for months without any ill effects on primer or powder.
The failures are non-ignition of primers.
I am actually surprised at what it seems to indicate. A direct spray on the primers seems to have no damaging affect UNTIL powder is added to the mix. The idea of testing with powder as additional variables was added a week after I started the primary test of just sprayed primers in a bag and a control group of primers in a bag. Now I wish I would have tested more of that group with sprayed primers plus powder. Oh, well. I think I have enough information to re-evaluate my loading steps.
I realize that the test is a little extreme since I directly sprayed the primers, but I wanted to get some clear answers. Also, I suppose it is theoretically possible that the Dillon case lube had no influence and there were 3 bad primers out of the tested 5, but I really doubt it.
If you think my test isn't fair, let me know why.
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