Welcome to the world of rimfire ammunition and it's consistently inconsistent performance.
Since you have a Vudoo you now have a means of seeing just how bad 22LR ammo is, at least you've eliminated one variable, the rifle's performance. I chrony every shot I take at ARA rimfire matches, and the large ES and std DV values are eye opening, even among the expensive match grade brands.
I've gotten to the point of just using Lapua Center-x for matches now as it has the best price vs performance value, and SK+ and Rifle Match ammo for practice or silhouette. I'll still get turd or two out of a box of Xact or Midas+ or the Black Box Eley's and the expense isn't justified IMO. Fortunately for me, both the Vudoo and the Anschutz's favor Lapua branded ammo over the Eley offerings.
A quick look through the smartphone app for the chrony tells a story:
Vudoo bolt action, 70 degree day 30.33 inHg 5300' Alt
CCI SV 70 shots
std dev 13.5
ES 61
min 1039
max 1100
averg 1070.4
Center-X 189 shots
std dev 7.4
ES 40
min 1099
max 1139
averg 1117.3
You definitely get better ammo for more $$. I've pretty much given up on domestic 22LR ammo as the European offerings are so much better in performance. Also, CCI rounds tend to run dimensionally larger in brass size, grab a pair of calipers and check the various brands. I have far less extraction problems when I don't use CCI, especially in the semi-autos.