kcub, I do use the Ballistic Tip and have done so since Nosler changed from the Solid Base Boattails. For ease of instant mental calculation when game shows up, I have grown to prefer a bullet with a MV of 3000 fps. The trajectory, when sighted in at 200 will be down 7 inches at 300, 20 at 400, and 40 at 500. I don't shoot deer at 500, so that bullet drop info is of little value, but at 400 I like to know it's 20 inches to plan for. Under rare circumstances, I have on occasion shot deer at 400 or so with my 270, though I have not tried it with the 260 and probably won't. I have taken quite a few coyote and pigs at 400, and even at 500 on one occasion, with the 260.
That preferred trajectory is what moved me from the 120 gr bullet in the 260 to the 100 gr bullet. I thought I'd give that lighter bullet a try for a couple of years as my coyote, hog, and deer bullet, and I can reach 3000 fps with it easily. I have a 20 inch barrel on my 260, so I couldn't reach 3000 with the 120 gr BT. After two years with the 100 gr bullet, I have learned that deer and large hogs tend to run further than they did with the 120 gr bullet. That, and the fact that the bullet rarely exits a big hog, has finally convinced me to go back to the 120 gr bullet, which always seemed to anchor the big hogs and the deer quickly.
Now, as to the type bullet, Partition versus Ballistic Tip, I get extremely good accuracy with the BT. I never could do that with the Partition. And I like the destructive results with the BT, and always got an exit when I used my 270, and almost always with the 260 and the 120 gr BT. I have come to believe that bullet speed is a real consideration when using the BT, which is why Roy Weatherby used the Partition. He was sending out those bullets at 3400 fps, and I expect that the BT's would fragment too quickly on large game at that speed. No matter what we hunt, we need penetration, and the Partition will give you that even at very high speeds, where the BT might or might not.
Over the decades I have killed a couple hundred deer with Ballistic Tips. I have learned how not to use them (quartering shots and breaking bones are not what you do with BT's).