Yes, sir - you have got that right! That ammo was identified as the best when I was lot testing for another rifle. I bought 2 cases of it, and have almost a whole case left. It is now shared between the two rifles.That's a crazy low SD, hope you managed to buy a bunch of that lot of ammo.
CZ457 + L3i barrel is definitely hard to beat for value for money.
As soon as I find sufficient availability for 6-10 lots, I plan to lot test the first 457 and my soon to be second L3I barreled 457.