I've run 200 gr bullets in .38 S&W through my Webley Mk. IV in an attempt to duplicate the original British .38/200 loading.
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.
I've run both the Lyman 358430 and NOE 363200 over 3 gr of Unique in starline brass with Winchester small pistol (non-magnum) primers and had no indication of excess pressure (primers looked normal, extracted easily) in my 4" Webley Mk. IV, recoil felt roughly equivalent to that of standard 158 gr LRN .38 Special factory ammo in a medium-frame revolver. I have, however, since chronographed that loading with the Lyman 358430 and was getting velocities a little too high for comfort (right at 700 fps). I think I may back down to 2.5 gr of Unique and run them over the chrono again to see if the velocities are closer to my comfort zone (600-650 fps).
I cannot stress enough that the aforementioned data is beyond current book maximums (my 49th Edition Lyman manual lists 1.9 gr of Unique as max for the 358430). Such heavy loadings should only be used in Colt or S&W solid-frame revolvers or Webley and Enfield top-breaks. Top-breaks made by companies like H&R, Iver Johnson, Hopkins & Allen, Forehand & Wadsworth, and even S&W simply are not strong enough for these sorts of loadings (they're also most likely the reason that published data is kept so mild).
CAUTION: The following post includes loading data beyond or not covered by currently published maximums for this cartridge. USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assume any liability for any damage or injury resulting from use of this information.
I've run both the Lyman 358430 and NOE 363200 over 3 gr of Unique in starline brass with Winchester small pistol (non-magnum) primers and had no indication of excess pressure (primers looked normal, extracted easily) in my 4" Webley Mk. IV, recoil felt roughly equivalent to that of standard 158 gr LRN .38 Special factory ammo in a medium-frame revolver. I have, however, since chronographed that loading with the Lyman 358430 and was getting velocities a little too high for comfort (right at 700 fps). I think I may back down to 2.5 gr of Unique and run them over the chrono again to see if the velocities are closer to my comfort zone (600-650 fps).
I cannot stress enough that the aforementioned data is beyond current book maximums (my 49th Edition Lyman manual lists 1.9 gr of Unique as max for the 358430). Such heavy loadings should only be used in Colt or S&W solid-frame revolvers or Webley and Enfield top-breaks. Top-breaks made by companies like H&R, Iver Johnson, Hopkins & Allen, Forehand & Wadsworth, and even S&W simply are not strong enough for these sorts of loadings (they're also most likely the reason that published data is kept so mild).