IIRC the .357 Magnum was originally designed with/for and 8 3/4" inch barrel.
So much depends on the load and the powder used, the spectacular muzzle flashes often pictured are usually due to a slow burning powder burning outside the barrel-where it is wasted. When I first started loading for the 41 Magnum I used 8 grains of Unique under a 210 SWC, I noted unburned powder in the cases, I cut back to 7.5 grains, same accuracy, no unburnt powder.
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