I have a boat load of the 64gr. PSA sells it on sale frequently. Sometimes free shipping.
As far as how well it functions, there are so many different AR's out there with so many chamber variations, it is hard to say across the board. I have no issues with it. The accuracy will vary with your gun, twist rate, chamber, and what your barrel likes.
Two AR's with the same exact specs and manufacture may favor one load over another. You can get some general ideas, but it just depends on how far you want to go in relation to accuracy. Minute of man or minute of angle?
There may be better loads. I suggest it is a decent load. I have paid $9.99/box, not bad for the class of ammo. Your mileage may vary.
If you falter in a time of trouble, how small is your strength?