It just depends on what you feed it. Most people know I'm a fan of S&W Model 10s. I like 158 grain swaged SWCHP's over 7 grains of AA#5. It's pretty much a duplicate of the old FBI load. I'm not biased against 9mm, however. I've got a hi cap 9mm that stays close.
The difference I see is, a 9mm has to be loaded to high velocity with fairly hi tech bullets to get good expansion where a the old .38 swaged SWCHP made out of a lump of plumbers lead will flatten out the size of a nickel if you push it to about 975 fps. They're old school, low pressure loads that perform. 9mm needs high pressure and high tech bullets to be as effective as those old school, soft, .38 loads.
