I am not sure what you are looking for but Federal and Remington offer FMJ .357Sig rounds and as an alternative Remington also offers the 104gr LF357FA lead free frangible round 1,400fps and 453ftlbs of energy that is not a JHP.
Remington LE catalog quote
"Disintegrator™ bullet profiles are based on field proven Remington lead core bullet designs for reliable feed and function in a wide range of pistols. The lead-free priming compound provides clean, instantaneous ignition, while special powder blends enhance muzzle velocities to duplicate the felt recoil and point of impact of standard lead core bullets. A precise manufacturing and finishing process produces near perfect concentricity for superior accuracy. In close-quarter training, ricochet of high energy fragments is virtually eliminated - even when fired against angled surfaces, limiting the radius of dispersion from the impact point, and enhancing participant safety at minimal target distance. The unique performance characteristics of Disintegrator™ bullets against hard surfaces also creates potential use as service rounds in certain enclosed security situations. "