whitearrow,
As I pointed out in an earlier post, when heavy-jacket Ballistic Tips separate core and jacket it doesn't really matter, because the jackets still retain over half the original bullet weight. A LOT of hunters still think jacket-core separation is automatically a "failure," and it could be when even big game bullets had relatively thin jackets. (Though I've had two thin-jacketed big game bullets leave their core at the ENTRANCE hole on buck deer, yet the cores penetrated on into the chest and killed them.)
Yes, 250 fps in muzzle velocity can make a BIG difference in cup-and-core bullet performance, so you are NOT comparing apples to apples.
Yes, your test medium sucks, and you're assuming single examples are meaningful. Shooting at least 3 bullets into media is better, and 5 much better yet.
