This is from their website:
We believe these are the finest barrels on the market, each one is hand lapped. Our stainless steel barrel is bored and rifled by Lothar Walther in Germany. Tony Kidd then performs all the final machining to make our match barrel a worthy KIDD product. A proprietary chamber reamer is used to ensure the cartridge and bullet feed smoothly. Our barrels are chambered to accept .22 LR ammo and have a 1:16 twist
The Kidd barrels I have had in the past were good shooters and in researching barrels for this build, Kidd is always listed in top three. Federsen and Lilja being the others most often mentioned. But even then you are likely to see some shoot better than others within each brand. Kinda the "luck of the draw".