2014 article - now in Internet Archive. Exhaustive comparison of 46 products. Cliff notes: Hornady One Shot, Frog Lube & WD 40 Specialist all look excellent.
https://web.archive.org/web/20190402003701/http://www.dayattherange.com/?page_id=3667
https://web.archive.org/web/20190402003701/http://www.dayattherange.com/?page_id=3667