Congratulations on the fantastic trophies. I've been thinking about trying TSX in my .270, you have just made my mind up! Great shooting.
To be honest the bullets didn't group that well at first about 1 MOA but after increasing the load above max(which is quite low to begin with) they would shoot a perfect clover shape at 100 yards everytime. 300 yards was about 3 MOA. Do some experimenting with the OAL and grains, you will find a good combo.