Monocores are typically done because they're cheaper; more material efficient and quicker to machine with minimal assembly as compared to stacked baffles or welded cans. My 8" Accipiter burns up nearly 2 feet of bar stock, the baffles and blast chamber are quite a bit of CNC turning, and a lot of time is spent assembling and welding. An 8" monocore uses 8" of material, a subspidle lathe can do the simple profiling, boring and threading in minutes, and a VMC can carve out the " baffles" very quickly. A millturn or 4+ axis turning center can do it all and spit out a finished core that just gets a tube and a cap.
At any rate, there are lots of baffled pistol and rimfire cans. Some use conical baffles, some use radial cones, some have K baffles, a few use M baffles (a conical or radial with a "backwards" skirt).
I use conical baffles for everything except one-stamp integral rimfires because a monocore is really the only way to make them serviceable without being SBR. Otherwise, I avoid monocores entirely because outside of .22 rifles, they suck. Played with them for a long time trying to build a better mousetrap, eventually had to throw in the towel.
Our Salamander .22 can:
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Phoenix IX pistol can
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Accipiter & Aquilae rifle cans
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