There are just a few balls with the same core in 12-13 lbs, as in the 14-16 lbs.
The Storm Streetrods have it in the 13 pounder, the Brunswick Avalanche's in 12 and 13 pound.
All The 12-13 lbs balls from brunswick use the same sym./asym. core. The only difference then is the coverstock. For example the Copperhead haas the same core as the Swarm. This rules out the core when it comes to ballchoice.
Edited on 7/16/2008 3:46 PM