I have been on the hunt for a jacketed hollow point load that would clock near 1,000 fps......... Using a S&W Model 36 (no dash), I measured an average of 908 fps at ten feet with a 158 grain Hornady HP/XTP. Frank
And what is more, you aren't going to get 1000 FPS from a 2" barrel and jacketed bullets! Give up before you hurt the gun and possibly yourself. To even get 900+ with a 158 gr jacketed bullet from a nominal 2" barrel you are already playing in the range of .357 Magnum pressures.
he fact that the cases "almost fall out" is not a sign that the load is safe, or even in the vague vicinity of permissible pressure for .38 Special. .357 Magnum cases usually extract easily too, don't they? All easy extraction means is you haven't gotten into the 36,000PSI or higher area yet.
A 158 gr. LSWCHP +P, so-called FBI Load, factory loaded ammunition, will usually run in the the range of 800-850 FPS from a 2" barrel. This is my chronograph results from several 2" S&W M-10 and M-12 revolvers, not factory claimed velocity. These cartridges are loaded in the 18,000 PSI area to obtain this velocity. To get to 900, even from 850, takes a pressure increase of ca. 11%, or somewhat over 20,000 minimum. This is with Lead bullets, you will lose 100+ FPS simply by changing to a jacketed bullet, approximately.
I hope you are listening and paying attention, but even more I hope others who read your remarks about getting 900 FPS+ from a jacketed 158 gr bullet in a 2" (OK, 1 7/8") revolver being reasonable will read this and understand how dangerous what you are trying to do really is.
Don't misunderstand! I have been handloading, experimenting and hot-rodding revolver cartridges for many years, probably more than you have been alive. This was with full knowledge that very likely I would take a gun apart some day. I never have, but only by GOD's Grace. There simply isn't any purpose to it. If you want .357 Magnum performance from a .38 Caliber revolver, buy one! And for comparison, it is unusual to get much over 1000 FPS from a 2" .357 Magnum 158 gr factory loads, although I have seen ca 1100 FPS at times, and in warm weather. How do you expect to get that velocity safely in a .38? Especially a Model 36! Remember, there is no J Frame revolver prior to the J-Magnum frame that is even factory approved for .38+P, (18,500 PSI), let alone 30,000 PSI plus.