I've found that the Interbond from hornady has a much broader expansion range than the GMX. The GMX as noted earlier, performs well at higher velocities but not that great at the slower velocities of longer range. The interbond holds together very well at close range high velocity shots with reliable expansion at long range slower velocity. I use this bullet in my 6.8 SPC (it's a fraction long but I use it anyway and seat a fraction deeper) for hogs with great terminal performance. I know a lot of guys that use the same bullet in their .270's with excellent results on whitetails and hogs.