6mm#2 JDJ
257 JDJ
6.5 JDJ
270 JDJ
309 JDJ
8mm JDJ
338 JDJ
338#2 JDJ
358 JDJ
375 JDJ
411 JDJ
416 JDJ
475 JDJ
475#2 JDJ

I also have a 300 Whisper technically not a JDJ but he developed it. Also 40-44 Woodswalker & 40-454 Woodswalker. Almost forgot 375 JRS(375 on maximized 358 Win case).

Yeah I got alot. Currently own about 50 SSK barrels and have owned as many as 100. If you don't restrict this to Contenders I also have;
25-06 JDJ
6.5 MD
280 JDJ
30-06 JDJ
338-06 JDJ
375-06 JDJ
in the Encore.
I have at one time or another owned just about every chambering he makes. JD personally thanked me for funding a couple of his hunts. LOL.