.300 Whisper Sub-Sonic pressures equal to 9mm?

[steezo757]

I'm researching to see if I can have a custom suppressor made for the .300 Whisper. I've read that a 9mm suppressor is able to handle the pressures of the .300 Whisper Subsonic round. Is that true?

The can I want is essentially going to be a 9mm can with a smaller bore and maybe an extra baffle to add more volume.

My Form 4 for my .30 cal can is in process. The only disadvantage of this can is the weight (around 28oz, I think). It'd be great if there's a 10oz can strictly for the sub-sonic whisper.