Nosler said that the core is made out of harder lead alloy like their regular deer bullets. I got a load worked up today for amy 25-06 that is simply awsome. my setup is a 26" barreled encore 30-06 Lapua brass that was resized to 25-06 , neck turned so their concentric , the load is 59grs of R-19 , CCI BR-2 primer 85gr Silver Ballistic tip seated .025 off the lands. I'm getting just over 3800fps with only some flat primers and the accuracy is great consistant 1/2" at 100yds. I'm shooting these out of a moly prepped bore. I'm thinking that this shoud be a good Pronghorn and small deer load. I'm seriously thinking about getting some of the regular 85gr Varmint Balistic tips and molying them for shooting coyotes, they shoud have a serious splat factor.