I have been trying to do some internet research on a person with an unusual name, associated with a degree mill. Absolutely the only Google hit was a blog reference as follows: "[Person's name] says that converting to the 17 squirrel would work but you would have the same case lip lock situation as with the 17 ccm. Turning the rim off and cutting an extractor groove seems like a good way to weaken an already weak case." Clearly unrelated to education/degrees, but I'l still a bit curious what it's about. Guns, I would guess, but any further thoughts?
Sounds like they're talking about modifying ammunition cartridges. The .17 squirrel and .17 CCM are both types of small bore ammunition; mostly used for small game hunting or target shooting. These types of ammo are referred to as wildcats, which is the slang for hand made ammunition. So they are probably talking about some kind of conversion of the casing, maybe to be used in a particular custom rifle. The person might be trying to dissuade whoever this was to from using a lathe to cut the rim of the casing down, but I can't be sure. A weak casing could cause a round to misfire in the chamber, and I'm assuming the use of a lathe from them mentioning "turning" the rim. The need for an extractor groove sounds like a modification to fit a different type of chamber than the cartridge was originally intended for, which is why I assume it's for a custom rifle. Hope that helps!
I think that the term lip lock refers to the way the cartridge is connected to the bullet. Usually it's crimped in some way. If you trim down the casing then you might create a problem with the lip lock.
