A few random thoughts.. haven't posted here in awhile.
Barrel length:
Unless the Vudoo magicians have changed things since I got mine almost two years ago, the barrel you receive is likely to be a little shorter than what you order. In my case, I ordered 20" Kukri; as soon as I opened the box, I thought, "thats short" and sure enough it measured very close to 19 inches. I emailed Jill to ask about it; within minutes I had the response: they started with 20" blank and cut it at narrowest point for optimal accuracy. She offered to replace my barrel with one truly 20" in length if I wanted - nope, no need; it shoots; all good.
Barrel Tuner:
A buddy of mine has a Harrell barrel tuner he hasn't been using. Just for grins, I borrowed it to see what it would do to help my CZ-455 (16" threaded "Tacticool" barrel, mounted in MDT chassis) be more consistent. Well, with older Lapua-sourced Wolf Match Target (SK Std+) ammo, it did seem to tighten the groups noticeably in the roughly 50-round experiment. I didn't use any of my Center-X stash for this, but historically the WMT and CX performed similarly at 50 yards.
So, for giggles, I put the tuner on my Vudoo. First, I fired 10 rounds of Center-X to foul the just-cleaned bore. Then I fired a 5-round control group. Rounds 2-5 exemplified the best groups - essentially one hole, about 1/4" edge to edge - with first round 3/16" right. Second 5-round group, of course, wasn't that tight but still Vudoo-typical and as good as the CZ with "tuned tuner."
So I put the tuner on... bottom line is, after dinking with it for most of a box of Center-X using Hopewell tuning method, I took the thing off and went back to plinking half- or three-quarter-inch stones off the 100-yard berm.
Full disclosure: I do have a Kinetic Security Solutions ATS tuner on my Defiance Deviant/Bartlein .223... I struggled to get that rifle to shoot as well as a .223 should, and the tuner made a positive difference.
Magazines & feeding:
My Vudoo is in an MPA BA Comp chassis with adjustable mag catch. I have three polymer magazines and two 15-round aluminum ones. I believe it's been mentioned in this thread that the aluminum ones seem to fit a tiny bit tighter in a given stock or chassis than the polymer ones. This is true for mine. I do get more nose-down jams (using Center-X) with the metal ones than I'd like... bullet noses drag a little on the inside of the mag... is it enough to affect feeding...? With match season starting, I think I'll call Vudoo and discuss the situation.
New-gen Vudoo?
My rifle is first-generation. I love the thing. But, being retired and not traveling for a year due to Covid, "fun funds" are topped off. Is it time to try the goodness of the latest iteration of the V-22 repeater? Hmm.