Strictly, 2400 is a rifle propellant which is useable in revolver cartridges. It is perfectly safe for heavy .38 Special loads. Remember that .38-44 level loads are in the 25,000 PSI range or higher, which is in .357 Magnum territory. In the past they were specified as for Heavy-frame guns, N-Frame, Colt New Service, Single Action Army, not K-Frame S&W or D-Frame Colts.

You can use up to 11.8 gr/2400/158 LSWC (Old Lyman manual). You will get in .38-44 velocity range with ca. 10.5/2400/158 LSWC. These have all been shot and chronographed by me with no adverse results.

If you are shooting these in anything lighter than an N-Frame do not exceed 10 gr/2400/158 LSWC. Do not expect to see .38-44 velocities (1115-1150 FPS) from any revolver with a barrel length less than 6 1/2".

THIS IS MERELY A RELATION OF MY PERSONAL EXPERIENCE AND OLD REFERENCES. IT IS IN NO WAY A RECOMMENDATION. DO NOT SHOOT IN ANYTHING EXCEPT HEAVY FRAME REVOLVERS OR RIFLES.

I should have said too, since this seems to be a question posed by someone not very experienced as a reloader, that loading any ammunition to pressure levels that exceed +P levels is something not to be done until you have quite a bit of experience with standard loading. This is akin to recommendations made in the late 1930s about the .357 Magnum, and that was DO NOT ATTEMPT RELOADING THIS CARTRIDGE. See Phillip B. Sharpe, "Complete Guide to Reloading"!

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Gunsmithing since 1961