Gatornavy it is the Superformance SST's. I know you will hear some like it, some hate it, some can't group with it, and some could hit a dime wih it at 100 Yards. As I said above each rifle is different and prefers their own ammunition, kinda like a custom diet plan. This will hold true for each rifle and each type of ammo. This also holds true for different Lots of the same ammo. I just know what is currently working for me, but it was expensive to find. The only rifle that might be he exception is a Browning equipped with the BOSS that can be adjusted to shoot almost any ammunition really well. Remeber it's all about barrel harmonics.