Well, just like with the .410 shotgun and .22Hornet, it took powder manufacturers 60-70yrs to come up with the ideal powder- Hodgdons Lil'Gun Gun. But still, it's not as perfect as some would like (heat erosion in some cartridges).
I really, really like the .327fm. I think like the 6.5creedmoor, it's going to take a little while longer for just the right platform for it to come along. IMO, it just might be the new GP100 5" half lug barrel. At 39oz it isn't TOO heavy, will be stable to shoot and strong enough to get full capability of cartridge, but still all-day-portable. Not a "crew-served" hand-rifle like the 7.5" BlackHawk .30Carbine.
If S&W will follow with a release of another Model 16 in .327 with 4" and 6" bbls, and Speer make another run of 115gr GolDots. Or, perhaps a 115gr XTP.
To me, it's the ultimate reloaders field gun. The .32s&wl is even better as a plinker/target cartridge than the .38spl, and somewhat better yet for small game. IMO, it's the reloaders anwser to a reloadable .22rf. Up to .357mag in one package. I actually carry the little Single 7, where even my Ruger RSA6 (pre mk1) and S&W 6" 617 now stay home. I need another handgun like Bill Gates needs another dollar bill. But I really WANT one of the new GP100's in .327. This is what makes a new cartridge/guns successful. We've long had all the guns/cartridges we NEED.