Shooters of all quality rifles would do well to keep in mind that it's not the variety of ammo with a particular name on the box -- e.g. SK Standard Plus -- that will shoot consistently well with a particular rifle. Much more relevant and important is the lot number of the flavour of ammo in hand. In other words, a rifle won't prefer SK Standard Plus over SK Rifle Match. One particular lot of SK Standard Plus may well perform better in a certain rifle than another lot of SK Rifle Match.
Furthermore, SK Standard Plus and SK Rifle Match are made of the same components -- the same brass, propellant, bullets -- and are made on the same machinery. Each production run of SK ammo is sorted by quality, with the top standard velocity (1073 fps average) being SK Rifle Match. Among SK rifle ammos with 1073 fps average MV the next "best" is SK Standard Plus. Sometimes in some circumstances SK Standard Plus will perform better in a particular rifle. But it should not be taken as a generality such as "my rifle prefers SK Standard Plus over SK Rifle Match."
Regarding Vudoo chamber, I don't know if Vudoo has published or released information on a particular reamer used. Lilja, for example, uses different chambers on barrels, depending on the rifle for which they are made. These include Bentz chambers for the Ruger 10/22, Ruger 77/22, Sako FinnFire, Sako Quad rifles, the Lilja 2 for the Ruger Precision Rimfire Barrels, while Lilja's Anschutz 2007/2013 drop in barrels are made with the Eley EPS Match chamber. The Vudoo V22 repeater chamber is referred to by Mike Bush as the "22LR RAVAGE" chamber. Bush says the chamber in the forthcoming Vudoo single shot benchrest rifle will be "different." See h t t p s://www.rimfirecentral.com/forums/showpost.php?p=11858399&postcount=342 While not conclusive, this does suggest a tighter chamber for the new BR Vudoo.
What is known about the Vudoo repeater chamber is what Bush himself has chosen to reveal, but there is nothing to indicate that it is designed around a particular variety of ammo, Center X or other: "The chamber is a match dimension chamber of my own design and exclusive to Vudoo. As many of you likely know, the Win 52D chamber is the shortest and tightest of all match chambers. Without the lead, the chamber measures .580 in length, the Vudoo chamber is .605 in length. There are many match chambers that are longer and looser than the Vudoo, but as a match chamber, the Vudoo has no issues extracting and ejecting loaded rounds."
h t t p s://www.rimfirecentral.com/forums/showpost.php?p=11576429&postcount=37
Generally speaking, match-type chambers on many rifles often have dimensions that are a little more generous than single shot models and even more generous than on many custom single shot barrels, for which the shooter/gunsmith can choose the exact chamber. The reason for this is that the manufactures have to make chambers that will accommodate a wide variety of ammos, made by different ammo makers. Anschutz, for example, doesn't use the tightest of chambers because the manufacturer understands that users will be shooting many different varieties of ammo. Even if some common ammos like CCI SV can be hard to chamber in a "match-type" chamber, there are a lot of other standard velocity ammos that must be accommodated by the gunmaker.