No "bottleneck revolver backup syndrome?"
Same question. Cylinder rotation not impaired after the first couple shots?
My experience is the same as Chris. No case setback in my conversion either.
The reason is as Chris posted, the set back is due to the long taper of the .22 Remington Jet and other similar cartridges case taper.
Case set-back history:
The Ackley Improved cartridges used a simple concept; reduce the angle of the case by squaring the shoulder to increase powder capacity. However, besides improved performance, as indicated from improved rifle cartridges, was the lower back pressure result. Therefore sharp shouldered cartridges also prevent case set-back in revolvers.
For example; the cartridge most infamous for locking up cyls due to case set-back was, as referenced, the .22 Remington Jet with its long tapered shoulder. The case set-back along with performance that didn't meet manufacturers claims, and a few non-cartridge related factors, ultimately led to its early demise.
The resolution was simple, a non-tapered square shoulder ala the .256 Win Mag. The first was the Super Jet, by Dan Cotterman, which used the Ackley principle to improve the cartridge which it did, and had the added advantage of solving the set-back problem in the Model 53 S&W revolvers. Later versions like Ackley's Improved and the .22 Sabre Cat by Helbig soon followed. Albeit too late to save a good cartridge and a great S&W revolver. The public had soured on the cartridge and no manufacturers were interested in making guns for any of the new faultless versions, i.e., wildcats.
So what does this have to do with the .22-20 in revolvers? Minimum reamed chamber taper and proper full resizing of the case shoulders has given case set-back free .22-20 shooting in my Ruger.
