Honestly, people!
That core is an AMF special, thought up and developed by them a while back. Check out the original Cold Fusion, a resin pearl, developed, as far as I recall, by Del Warren, or when he was in charge of AMF bowling balls. See
http://www.bowlingballreviews.com/ball.asp?ballid=1073The Victory/R was just a renaming of the Cold Fusion.
No other ball ever had that core before, nor since, except AMF balls. I also appears to have a definite mass bias. I imagine the densities were adjusted somewhat for the slightly different actual numbers of RG and Differential.
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"We get old too fast, and too late, smart."
Edited on 7/11/2004 8:47 AM