I agree with Hawg.
A .44 caliber load with 30gr. FFFG & a .457 144gr. ball will produce about 860fps. 236ft. lbs. out of an 8" barrel, which is slightly better than the standard .38 spl load of 158gr. LRN.
A 5.5" barrel with the same load will produce about 810fps. 209ft. lbs..
The Walker revolver with the same Ball but with a 55-60gr. load of FFFG was close to .357 magnum power & at the time was the most powerful revolver till the advent of the .357 magnum.
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