While it shoots clean and the brass is GTG, the PMC Bronze that I got was dramatically slower then the XTAC version.
I also got pretty bad accuracy from my rifles, ( YMMV ) I would certainly try some before buying a case.... and frankly I will only buy the XTAC from now on.
As for fragmentation... well the low velocity of the bronze ( my lot at least ) is not gonna help anything.
My velocity, from my rifles... YMMV................................16" Barrel..........................20" barrel............................
PMC 55gr Bronze....................PMC 223 REM............Av. 2626 , ES 82...............Av. 2754 , ES 97........................ Just awful accuracy
PMC XTAC 55gr......................PSD 14........................Av. 2994, ES 33................Av. 3180, ES 72..........................Clearly crimped and sealed. Outstanding accuracy