FMJ yaw and upset performance

[stanc]

So yes, yaw performance is the key to terminal effectiveness, and that is difficult to combine with other requirements. This makes the design of the bullet essential to get right - it's the first priority, and may even determine what calibre the bullet comes in. Everything else follows from that.

How quickly do you want the bullet to yaw? The relatively stubby 6.8mm 115gr SMK has a neck length of a little more than an inch, and the more streamlined 6.5mm 123gr SMK is about 2.5 inches. While both of these are "open tip" designs, and therefore not themselves suitable for your purpose, I think they demonstrate what should be achieveable with similar FMJs.