I have some speer 7mm 175 gn grand slam bullets. when I bought them, I am sure they had 2 cores, a rear hard one and a front softer one. the front core from memory was bonded to the jacket., and a cannelure locked the rear core in. this seemed like a good concept for many hunting situations. a look at the speer wesite suggests that all those features other than the cannelure are a thing of the past. I am guessing that the average grunt saw no point in paying extra for what appears to be a superior bullet. probably could not tell the difference if they did. they also had a 285 gn 375 of the same design, amongst others. does anyone remember these bullets, and can comment on the difference between the old ones and the new ones. bruce.