I have owned and/or shot about everything JD has made. I'm lucky enough for him to visit me yearly with a car full of guns that we shoot and take crop damage deer with to check performance.
My Contenders have taken at least 5000 of the 13,000 groundhogs I've taken and 800 of the 2300+ deer I've taken. The most popular and effective have been the 6.5 JDJ and .309 JDJ.
JD is definitely an icon in the world of handguns and I consider myself extremely lucky to have him as one of my best friends.