Unless I'm off my medication again, they still have a secant ogive. Perhaps the caliber number changed, not sure about that.
Otherwise they shoot fine and dandy for me. I shot a few I traded for, and weren't signigicantly different. I caught a deal on on a mountain of 175 SMK's a couple years back, that I couldn't say no to.
Still have a few un-opened 500 packs, so no reason to switch.

Generally speaking, for me at least, BC isn't really that much of an issue unless you are out of bullets. As long as they are steady(BC) I've got enough adjustment in my Weaver to dial all I need, until the 1700 itch gets me...