Anyone out there have any ideas as to why they put that knurl just forward of the web area of Lake City "Match" brass????? The newer LC LR brass doesn't have it. Other than to help it stick in a chamber what possible reason or purpose could it serve???? I have never seen this addition on any other brass except some military {cant remember if it was Lake City or not} 38 Special brass, and it was not match. I think it might have been a little further up the case too, but same identical looking stupid little knurl. Thanks in advance for any info.