Nice report!
Those FTX's look like they have a lot of potential. That is some pretty good shooting at 300 yards for the first time- I'm sure you'll be able to get it dialed in even better as time goes on.
Does Hornady supply a chart stating the velocities that FTX is rated for? I just wonder if at 300 yards will the velocity be high enough to ensure expansion? Just a thought.... Otherwise, looks awesome! Personally I would think the recoil to be a bit more than I would like to shoot on a regular basis (130 grains powder, 325 grain bullet), but if you're comfortable with it, great.