I just ordered a box of this new ammo (X22MSUB) from Cabelas. I have had my 650 with both cylinders since it's introduction. Way back when, I shot a snake with WMR Shotshells and I will never forget the deafening ear ringing blast that lasted for two days. Since then, the LR cylinder was swapped for the WMR which remains unused since. Yes, over the years, I have tried some the new offerings in 22WMR and WRF, but I still find them too noisy. A kit gun is just that and shouldn't require ear protection to be fired on occasion while afield. This new subsonic WMR ammo should allow me to use that WMR cylinder once again with a blast not unlike that of 22LRSV. Am I assuming correctly here, or did I waste the money? For those not familiar with either. the 650 is a 3" revolver and the ammo is 45gr WMR @ 1060fps from a rifle. All opinions and theories welcomed and appreciated!