Happened to find a data sheet of some chronograph results with .22 Magnum ammo. The guns used were two S&Ws, a 48 with a 8 3/8" barrel and a 4" 63 that had an extra 651 cylinder fitted. I still have the 63 but sold the 48 about 2 years ago..

I have data for all rounds when fired through the 48. I only did about a 1/3 of them through the 63. Where there is only one number that will mean that the ammo was only shot in the 48. If a second lower number is present than that would be the 63.

CCI MiniMag 40 gr. JHP: 1400/1277

Winchester 40 gr. JHP: 1391/-

Fiocchi 40 gr. SP: 1433/1262

Federal Classic 50 gr HP: 1153/-

CCI TNT: 1590/1430

Federal 30 gr. HP: 1680/1452

Fiocchi 40 gr. HP: 1352/-

Remington 40 gr. PSP:1322/-

Remington 32 gr. V-Max: 1457/-

Remington 40 gr. HP: 1315/-

RWS 40 gr. HP: 1404/-

CCI MaxiMag 40 gr. FMJ: 1385/1237

CCI MiniMag +V: 1699/-