I was encouraged to be able to find a gas check, hard cast, lead bullet for it (Rimrock). I expect that only the Federal Magnum loads would gain advantage from or require gas checks for the hot loads, high pressures, and velocities of the 327.
When the reloading suppliers get or lose interest in a cartridge, I think that is the real barometer of interest in sustaining a caliber. We already have our "reloader's calibers" like 44 S&W Special, 41 Magnum, et al., for which store ammo is all but non-existent, especially if you don't care for Hornady's FTX bullets requiring shortened cases and special reload provisions.