Ok, did a little lot test on 3 lots of SK LR that I've got in the new Vudoo.
The setup:
First, 20 rounds of each at 50yds with the magnetospeed..
Chronograph results:
Then a 6x5 of each lot:
0.35 average
0.391 average the wind got a little squirrely for groups 2 and 4..
0.316...