I got this off the RTI site for the Compact Prophet II, I know there is a few compact owners that were a little pissed that RTI did a switch on the barrels. And now it seems if you did buy a 22 caliber compact Prophet II with the switched barrel its a miss sized barrel, I just wonder how many Compact guns did RTI sell before they caught the problem or if they ever did catch the problem with the oversized barrel..
Below there still advertising the RPB Barrel.
Accuracy-wise, our .177 and .30 cal versions retain the original, proven Lothar Walther barrel, but with the .22 and .25 cal, we are introducing a new proprietary RTI Barrel, optimized for both pellets and slugs! Accuracy is going off the grid with this new barrel… shot count is also very good (even more with the large bottle)