I have to say my 327 fed mag snub. I shoot my ,357mag at the indoor range I use and they don't complain.
When I get out my ,327 fed mag, people start backing out of the lanes with their hands over their head sets.
I had to quit shooting full house 327 fed mags their because of complaints. I still shoot two different .357 mags their and they seem to be ok with that.
From standing behind it pulling the trigger I don't notice it being any loader than my .357s but from all the complaints about my .327, something' causing it.