This has always been the case with my system (Reverb G2, Win10, 5900X, RTX3080), shaking reduction introduced stutter, proportionally to the % applied. I love OpenXR Toolking for other features (FSR, FFR, hand tracking, color adjustment, it’s a treasure!), and I thought it’s just my particular setup that exhibits that issue. I tried it again recently when it was suggested as a fix for a jitter introduced by OpenXR Motion Compensation that I use for my home-built motion simulator but again it just introduced its own stuttering. OXRMC fixed the problem and there’s no stuttering now, so I don’t need the shaking reduction anymore. Though I don’t really have a head shaking problem unless I get way too much bass through my transducers. Apparently some people get great results with shaking reduction, so it depends on a particular setup I guess…