Many years ago Creighton Audette and I talked frequently over the telephone and on several occasions while I was shooting at Camp Perry, Ohio! Creighton was an engineer and knew external and internal ballistics inside and out. He was a shooting member of the USA Palma Team many years and not only a great marksman but one with a highly inquisitive mind concerning the things related to extreme rifle accuracy. German Salazar mentions Mr Audette in some of his articles; in particular those in which he addresses the issues of the importance of NOT having consistent cartridge brass. I purchased the below tool/guage from Creighton many years ago and used it extensively during the years I competed in NRA Highpower comp as well as I do currently in an attempt to wring the most in accuracy from my rifles. IMO it is a precision instrument and once learned how to be used a valuable tool for possibly eliminating certain shots that arise upon the target face at times. A particular version of this tool is still being made and for those interested I recommend consulting German Salazar's article reference this issue at this Link: http://riflemansjournal.blogspot.com/2009/07/reloading-audette-neco-case-checker.html

Creighton Audette ingenious tool for finding thin side of cartridge brass. by Sharps45 2 7/8, on Flickr

IMG_1948 by Sharps45 2 7/8, on Flickr

Creighton Audette ingenious tool for finding thin side of cartridge brass. by Sharps45 2 7/8, on Flickr

IMG_1948 by Sharps45 2 7/8, on Flickr